106results about How to "Interconnected" patented technology

The invention relates to a floating type train brake lining with replaceable friction blocks. The train brake lining is characterized in that the train brake lining comprises a brake lining back plate, a plurality of brake lining friction block bodies, a plurality of elastic supporting pieces and a plurality of round spring clips; installation holes are arranged on the brake lining back plate; elastic supporting pieces are provided with spherical supporting surfaces and central guide holes; lower portions of friction block bodies are provided with spherical supporting surfaces and positioning connection shafts with clamping grooves, and connection shafts can penetrate through central guide holes of elastic supporting pieces and positioning holes of the back plate and are locked on the back plate by round spring clips to achieve floating connection; and friction block bodies are polygonal block bodies with blind holes in centers, and every three friction block bodies form an interlocking group, so that rotation of friction block bodies during operation of the brake lining is prevented. By the aid of the brake lining, the maximum contact friction area between the brake lining and a braking disk can be obtained during braking of a train, so that the braking process is stable, functions such as damping, vibration absorption, noise reduction and heat dissipation are provided, friction block bodies are easy to replace, the operation cost of the train is reduced, and the brake lining can be widely used in braking systems of high-speed trains.

The invention discloses a manufacturing method for a seabed photoelectricity composite rope with a split conductor in huge cross section, which comprises the following steps: wire drawing, twisting, strand segmentation, conductor segmentation, three-layer extrusion, water stop band wrapping, degassing treatment, lead sheath extrusion, semiconductive sheath extrusion, optical unit twisting, wire armoring, outer sheath extrusion and finished product winding. The maximum sectional area of the conduct of the seabed photoelectricity composite rope manufactured through the method provided by the invention can reach 2500mm2, the seabed photoelectricity composite rope can bear the voltage of 220 KV to the maximum when in operation at seabed, the depth of the paved seabed photoelectricity composite rope can reach 8KM, and the distance of two objects connected by the seabed photoelectricity composite rope can reach 40KM, so that the product has high capacity and high security in the transmission of electric energy.

This invention relates to polyester / mesoporous molecular sieve composite material and its preparing method. Using mesoporous molecular sieve fine particles with definite grain size, aperture and acid-base value, after drying, mixing with liquid polyesters, esterifying to obtain esterified mixed product, during reaction combining with ultrasonic dispersion technology to make monomer and molecular sieve fine partticles mix uniformly, by precondensation and endcondensation under constant temperature and pressure esterified product to obtain a product, by granulating and drying to be agglomerates. During prparation, under vacuum and ultrasonic action, monomer can enter to particle aperture, by in-situ polymerization, particles inside and outside is coated with polymer, bonding polyester and molecular sieve interface well to form polyester / mesoporous molecular sieve composite material with inorganic-organic interpenetrating network structure. The material properties, such as melt crystallization temperature, crystallinity, glass-transition temperature and bending strength, storage modulus elasticity modulus are obviously improved.

The invention discloses a method for preparing tile grout, and belongs to the technical field of construction materials. The method comprises the following steps: mixing chitosan-polyvinyl alcohol hydrogel and saturated sodium carbonate solution, and filtering to obtain pre-treated hydrogel; stirring and mixing pretreated zeolite and degraded protease, and filtering to obtain modified zeolite; mixing graphite and oxidant, stirring to react, concentrating by rotary evaporation to obtain oxidized graphite; sequentially weighing the following components in parts by mass: 30-40 parts of cement, 50-60 parts of quartz sands, 2-6 parts of pigment, 8-12 parts of pretreated hydrogel, 12-15 parts of modified zeolite and 6-10 parts of oxidized graphite; and stirring and mixing the raw materials, adding water which is 0.6-0.8 times mass of the cement, continuously stirring, and discharging to obtain the tile grout. The tile grout has excellent mechanical performance, and the phenomenon of efflorescence can be reduced.

The invention relates to a drawing transformer, which comprises: a three-phase transformer connected to the public electric network; one single-phase transformer connected to the railway drawing load; one three-phase rectify inverter, one direct-current energy storage device, and one single-phase rectify inverter are connected between three-phase transformer and single-phase transformer. Said device can output same phase at nearby transform stations of railway, without dividing phase; and the power of each transformer is stable, to form high-speed and high-load operation of machine.

The invention discloses an intelligent water management system based on cloud computing and a work flow thereof, including cloud computing servers, a water level monitoring module, a drainage module,a water service operation module, a water Security Module, a tap water dispatching module, a sewage treatment module, a water quality monitoring module and a client terminal, wherein the water level monitoring module, the drainage module, the water affairs operation module, the water affairs security module, the tap water dispatching module, the sewage treatment module and the water quality monitoring module are all connected with the cloud computing server through a signal, and the cloud computing server is connected with the client terminal through a wireless communication module. As each module is connected with a cloud computing serv, the cloud computing server collects, stores and mines all kinds of data, and all kinds of data can be obtained directly in cloud computing server, whichhas good real-time performance and realizes the correlation of all kinds of data. According to the real-time data, the server can analyze the status of water in real-time, preserve the history, make automatic statistics and early warning diagnosis, and guide the comprehensive operation.

The invention discloses a highway green aisle vehicle information management system. It includes data acquisition subsystem to collect vehicle body image information, license plate image information and cargo image information, and the vehicle body image information, license plate image information and cargo image information is sent to the data storage subsystem through the data transmission subsystem; the data transmission subsystem is used for transmitting the information sent by the data acquisition subsystem to the data storage subsystem and transmitting the data sent by the data storagesubsystem to the remote access subsystem; the data storage subsystem is used for storing vehicle body image information, license plate image information, cargo image information, axle number information, lane information, release mode information, exempt amount information, operator information and conduct analysis; the remote access subsystem is used to provide an interface for the client to access data in the data storage subsystem. The invention realizes the automatic management on the whole green aisle, has high audit efficiency and simple procedure.

The invention discloses a display panel which comprises an array substrate and an opposite substrate which are oppositely arranged, the array substrate comprises a plurality of pixel units arranged inan array mode, each pixel unit comprises a plurality of sub-pixel units, and a black matrix is arranged on the side, facing the array substrate, of the opposite substrate. A black matrix layer comprises at least one pixel opening, a blocking area and at least one communication opening, the pixel openings are in one-to-one correspondence with the sub-pixel units, the blocking area divides the pixel openings, the communication openings are formed in the blocking area, and the pixel openings are communicated with one another through the communication openings. According to the display panel, through the arrangement of the communicating openings, the mutual communication of all the pixel openings can be realized, so the blocking effect of the terrain of the black matrix layer can be overcome,an alignment liquid can cross the blocking effect of the blocking area and quickly and uniformly flow into the openings of other pixel areas, and the problem of non-sticking of the alignment liquid is solved.

The present invention discloses a distributed scheduling communications device, which includes unit modules and an external transmission bus, wherein, the external transmission bus is connected to each unit module, the unit module is the smallest independently operated intelligence control terminal module, and is the minimized independently operated all-digital program-controlled scheduling telephone switch. The unit module includes an external bus adaptation interface, a program controlled processor, a timing control circuit, a data memory, a program memory, an analog telephone interface circuit, a man-machine interface circuit, a special signal tone circuit, and a sound recording circuit, wherein, the speech data between each telephone interface in the unit module adopts a digital time slot switch, and its data format and signaling is compatible to the digital program-controlled telephone switch. The invention combines the superiority of circuit switching and soft switching, adopts an independently operated unit module to configure according to requirement, so that the invention has advantages of modularization, digitalization, non-bottlenecks, adapting to various transport protocols, low application cost, high system reliability, good apparatus ductibility and so on.

The invention discloses an automatic food vending machine achieving cold insulation and advance selling. The automatic food vending machine comprises a machine body which comprises a scanning device, a control device and a storage pushing device, and the control device controls the scanning device and the storage pushing device. The machine body is of an internal cavity structure which is internally provided with a partition plate, the partition plate divides the cavity structure into an insulating chamber and a refrigerating chamber which are each internally provided with a lifting pushing device and a storage device, and the lifting pushing devices and the storage devices are arranged in an adjacent mode. According to the automatic food vending machine achieving cold insulation and advance selling, an order is placed through reservation, and a consumer can obtain food which is fresh and good in taste by scanning a code by himself / herself at a fixed time and location.

The invention relates to an ultra-high magnesium aluminum alloy which can make an injection body deflected and a preparation method thereof, in particular to the ultra-high magnesium aluminum alloy which is prepared by adding 13 weight percent of Mg in aluminum, adding expanded perlite to synthesize Mg2Si in situ, and adding rare earth Nd in Nd-Fe intermediate alloy mode. The ultra-high magnesium aluminum alloy can be used in externally hung type light tanks, troop vehicles and other light armors or composite armors thereof, and armor protective materials of a civil armored van, a bullet-proof car and the like. Furthermore, the invention lays foundation for the attempt to research and develop structure-function integrated light armored materials.

The invention discloses an operating room high-value consumable management system, a method and a computer storage medium. The operating room high-value consumable management system comprises a consumable management and control terminal which is used for receiving a consumable management and control request input by a user; a consumable application and refund management module is used for generating an application list, and / or a refund list and / or a replenishment list of the high-value consumables according to the consumable management and control request; a consumable warehouse-in and warehouse-out management module is used for generating a flow record after the high-value consumables are applied, returned or replenished according to the application list, and / or the returned list, and / or the replenishment list; a consumable stock management module is used for updating the stock state, the storage position and the stock quantity of the high-value consumables in real time according to the flow record. According to the invention, through the consumable management and control terminal, the consumable application and refund management module and the consumable warehouse-in and warehouse-out management module, the problems of zero-inventory purchase of high-value consumables, excessive use of the consumables and the like can be effectively solved, and the requirements of hospital data integrated management are met.

The invention discloses a method and device for generating an intelligent mining prediction cutting secant of a coal mine stoping working face. The method includes the steps of obtaining a dynamicallymodified high-precision transparent three-dimensional geological model of a stoping working face coal seam based on a unified coordinate system; obtaining actual cutting secant data of coal cutting top and bottom for the previous cut and converting the actual cutting secant data into data based on the unified coordinate system; generating N*(M+1) grid lattice data of a coal seam roof and a coal seam floor for future N cuts; optimizing and calculating the height adjustment values of a front roller and a rear roller of a coal mining machine for future N cuts; calculating and obtaining top and bottom prediction cutting secants of the coal mining machine for the next cut according to the actual cutting secant data of the coal cutting top and bottom for the previous cut and the height adjustment values of the front roller and the rear roller of the coal mining machine for the next cut; and restricting the coal mining machine to complete automatic coal cutting with one cut according to theprediction cutting secant for the next cut and repeating the previous steps. The dynamic correlation between the actual cutting secant for the previous cut and the spatial form changes of the coal seam for future N cuts is realized, and a better prediction cutting secant computing method is provided.

The application provides an alarm clock setting method, an alarm clock control system and an alarm clock system. The method comprises the following steps: acquiring an alarm clock setting instruction, analyzing the alarm clock setting instruction to obtain an alarm clock setting mode and a user identity associated with the alarm clock; determining a setting user for setting the alarm clock time and a reminded user of the alarm clock according to the user identity, and acquiring reminding time set by the setting user; and setting an alarm clock system of the reminded user according to the reminding time so as to remind the user at the set reminding time. The mutual association of the alarm clock systems is realized, and the use of the user is facilitated.

The invention relates to a multi-software collaborative transformer substation three-dimensional planning method. The multi-software collaborative transformer substation three-dimensional planning method comprises the following steps: S1, creating a volume model and a site model; S2, integrating the volume model and the site model to generate a planning element model; S3, identifying planning elements in the planning element model, and extracting constraint conditions to form a power planning model; S4, integrating the power planning model and the site model to generate an integrated model, performing interference collision detection, and determining a dynamic demolition demand; and S5, introducing the integrated model into three-dimensional measurement software and three-dimensional rendering software, and displaying a planning scheme in a three-dimensional mode. Compared with the prior art, the multi-software collaborative transformer substation three-dimensional planning method hasthe advantages of planning and design connection, high practicability and the like.

The invention provides an image management system of biological species. The system consists of a client side and a cloud service platform, wherein the client side is provided with a user registration module, a login module, an image importing module, a species name identification module, a feature tag identification module, an image retrieving and publishing module, a cloud service platform setting metadata fetching module, a species image processing module and a data storage module. The mass importing, the batch processing, the uniform storage, the classification storage, the efficient management and the quick and accurate retrieval of biological species images and relevant information can be realized. By use of the system, a species image attribute field is set to be matched with the standard name of the biological species and the standard field of species features, and the storage management, the quick retrieval and the service application of mass biological species images and the relevant information can be effectively realized. The system is high in universality, and can be expanded to the storage and the utilization of various types of biological relevant documents and multimedia data according to requirements.

The invention provides a massage air bag. The massage air bag is composed of two diaphragms, the two diaphragms overlap with each other and are connected through a connecting portion, and the head of the connecting portion and the tail of the connecting portion extend to edges of diaphragms respectively, so that an inflatable portion is formed between the connecting portion and edges; and the tail end of the inflatable portion which is arranged between the close head and the tail and extends to edges forms a gas channel through which the inflatable portion is communicated with the air. The massage air bag is provided with the gas channel which is integrated with the inflatable portion, so that the integrated forming of a plurality of massage air bags and gas channels and the mutual communication of the plurality of massage air bags can be achieved, no additional air duct is required for connection, the quantity of air ducts and fault points are reduced, the operation reliability of massage air bags can be improved, and the provided massage air bag and an air bag group containing the massage air bag are small in massage area contacting with human bodies, high in pressure and good in massage effect.

The invention discloses a multi-wall sandwich structure carbon fiber composite material and a preparation method thereof, and belongs to the technical field of a carbon fiber composite material forming process. A co-curing and liquid forming mode is adopted for three prefabricated parts of upper and lower covers, a beam and a sandwich material, a reinforcing material is impregnated with resin, and the prefabricated parts can communicate with one another, so that the overall synergistic effect mechanism of the component is exerted, the quality stability of the sandwich structure is improved, the purposes of uniformly distributing loads on all parts, reducing the weight of the structural part and improving the overall performance are achieved, and the problems of failure debonding, stress concentration and the like of the cover and the sandwich structure in a traditional forming process are solved.

The invention aims at overcoming at least one defect in the prior art, and provides a propelling device of a shield tunneling machine to reduce the support manufacture cost and improve the construction efficiency. The propelling device comprises at least two supports which are detachably connected end to end to form a support set. The shield tunneling machine is arranged on the support set, wherein the shield tunneling propelling direction is the head end, and a counterforce component is arranged at the tail end of the support set. According to the propelling device, by means of the supports which are detachably connected end to end, cyclic utilization of the supports is achieved. The shield tunneling machine is arranged on the supports, the shield tunneling machine conducts propelling forwards through the counterforce component and moves towards the head end relative to the supports. When the shield tunneling machine moves by the distance of at least one support, the support located at the tail end can be detached and moved to the head end, and cyclic utilization of the supports is achieved. The operation method of the propelling device is simple; and because the detachment and installation methods of the supports are simple, dynamic cyclic utilization of the supports can be achieved in the propelling process of the shield tunneling machine, and efficient construction can be achieved.

The invention discloses an establishment and display method and system of an object visual label in a smart visual internet of things. The method comprises the following steps: 1) collecting images ofdifferent types of objects through the smart visual internet of things; 2) establishing a corresponding visual label library for the different types of objects according to the collected images, andestablishing corresponding identification modes for the different types of objects; and 3) selecting the corresponding identification modes for identification according to the type of the objects anddisplaying visual label information of the identification objects. The method and system, for the problem of establishing visual labels for focused face, license plate and object images in the smart visual internet of things, establish corresponding visual labels for people, vehicle and object images through a certain algorithm, and realizes mutual correlation of the three kinds of visual information.

The invention provides a model training method and device, an information extraction method and device, equipment and a storage medium, and the information extraction method comprises the steps: carrying out the classification recognition and sequence labeling of a to-be-extracted sentence text according to a reading understanding model obtained through training, and obtaining a classification recognition result and a sequence labeling result of the to-be-extracted sentence text, the sequence labeling result is used for indicating field values corresponding to multiple preset fields in the sentence text to be extracted, the field values corresponding to the multiple preset fields are associated according to the association relation of the multiple preset fields, structured data are obtained, and the structured data comprise the multiple preset fields and the field values corresponding to the multiple preset fields. According to the method, the field values corresponding to the multiple preset fields can be extracted, and mutual association of the field values can be realized to obtain the structured data.

The invention relates to a fabricated prefabricated wallboard, a floor slab and a fabricated prefabricated wallboard and the floor slab connecting structure. The fabricated prefabricated wallboard and the floor slab connecting structure comprises the floor slab and the wallboard, the floor slab is composed of a first light steel frame, a closed corrugated steel plate, a first reinforcing mesh and a first concrete layer, and the wallboard is composed of a second light steel frame, a second concrete layer, a second reinforcing mesh and a corrugated steel plate. According to the fabricated prefabricated slab convenient to assemble, the overall dead weight of the floor slab is reduced, formwork-free construction can be achieved during assembly, the construction speed is increased, and the construction progress is accelerated; and meanwhile, the usage amount of concrete is reduced, the cost is saved, compared with a traditional light steel keel grouting wall, the wallboard is more convenient and faster to install, more time and labor are saved, a large amount of cost and time of manual operation are reduced, and meanwhile, the construction cost is reduced.

The invention discloses a cosmetics container with a roll ball head. The cosmetics container comprises a soft bag, wherein a coupling head is movably arranged in an opening of the soft bag; the outer end part of the coupling head is provided with a roll ball; a housing for limiting the position of the roll ball is coupled to the outer end part of the coupling head; the roll ball protrudes to the outer side of the outer end surface of the housing; and a runner for communicating the roll ball with the soft bag is arranged between the roll ball and the soft bag. The cosmetics container is characterized in that a spring enabling the coupling head to extend to the outer side of the opening of the soft bag is arranged in the opening of the soft bag; the coupling head in an extending state enables the runner to be in an unblocked state; the cosmetics container also comprises an end cap; the end cap is coupled at the opening of the soft bag and is capable of overcoming the elastic force of the spring so as to be used for pressing the coupling head towards the inner side of the opening of the soft bag; and the pressed coupling head enables the runner to be in a blocked state. According to the cosmetics container, cosmetics can not leak when the cosmetics container is carried, and therefore, the cosmetics can be conveniently carried when a user goes out.

The invention discloses a manufacturing method for a seabed photoelectricity composite rope with a split conductor in huge cross section, which comprises the following steps: wire drawing, twisting, strand segmentation, conductor segmentation, three-layer extrusion, water stop band wrapping, degassing treatment, lead sheath extrusion, semiconductive sheath extrusion, optical unit twisting, wire armoring, outer sheath extrusion and finished product winding. The maximum sectional area of the conduct of the seabed photoelectricity composite rope manufactured through the method provided by the invention can reach 2500mm2, the seabed photoelectricity composite rope can bear the voltage of 220 KV to the maximum when in operation at seabed, the depth of the paved seabed photoelectricity composite rope can reach 8KM, and the distance of two objects connected by the seabed photoelectricity composite rope can reach 40KM, so that the product has high capacity and high security in the transmission of electric energy.

The invention discloses an oil duct communication device, belonging to the technical field of down-hole drilling tool equipment. The oil duct communication device is characterized in that a first joint part comprises a first shell, a first joint and a first central pipe; the first joint is provided with a first medium channel and a first central hole; a first valve core thimble is fixed in the first medium channel; the first valve core thimble is provided with a first annular groove; a first O ring is sheathed on the first annular groove; the second joint part comprises a second shell, a second joint and a second central pipe; the second joint is provided with a second medium channel and a second central hole; a second valve core thimble is fixed in the second medium channel; the second valve core thimble is provided with a second annular groove; a second O ring is sheathed on the second annular groove; a circular ring is connected to a joint pipe; and one end of the joint pipe is inserted into the first central hole, and the other end is inserted into the second central hole. The oil duct communication device can implement automatic communication of the oil duct, prevents the down-hole motor from damage, and effectively ensures the stable operation of the down-hole motor.

The invention belongs to the field of semiconductor even glue developing, and specifically relates to a developing liquid constant temperature maintaining pipeline system. The outlet of a thermal insulation water circulating system enters a developing unit through a water inlet pipe and is connected to a liquid collecting block, a developing liquid pipe that is connected to a developing liquid source enters the developing unit and is connected to the liquid collecting block, a water-liquid separation type liquid valve, and a liquid dividing block; the developing liquid pipe arranged between the liquid collecting block and the water-liquid separation type liquid valve and the developing liquid pipe arranged between the liquid dividing block and the water-liquid separation type liquid valve are both provided with a thermal insulation water sleeve; thermal insulation water provided by the thermal insulation water circulation system flows between the thermal insulation water sleeve and the developing liquid pipe; the thermal insulation water, which flows out from the liquid dividing block, enters one cavity of a nozzle and is communicated with the thermal insulation water circulating system through a water return pipe; the developing liquid that flows out from the liquid dividing block enters the other cavity of the nozzle and is sprayed on the surface of wafers. Through the provided system, after the developing liquid enters the developing unit, the developing liquid is completely soaked in thermal insulation water, the exposure of developing liquid to external space is avoided, and thus the influences of other factors on developing liquid are reduced.

The invention provides a method for determining a shape factor of a particle swarm, comprising the following steps of: 1) establishing a particle swarm condensation liquid-solid reaction model; 2) determining grain diameter distribution of a solid particle swarm to realize mathematic expression; carrying out reaction with a liquid solution on the particle swarm under the conditions of constant temperature and constant solution concentration; weighing and determining a dissolving rate of the solid particle swarm; and fitting to realize the mathematic expression; 3) on the basis of the particle swarm condensation liquid-solid reaction model, utilizing measurement fitting data to calculate to obtain a comprehensive chemical reaction coefficient k and a change rule thereof of a liquid-solid two-phase chemical reaction; 4) when the shape factor phi of the particle swarm is about 1, carrying out experiment calculation to obtain the comprehensive chemical reaction coefficient k of the liquid-solid two-phase chemical reaction, namely a k0 value; and 5) calculating a specific value of the k value obtained by test calculation to a theoretical comprehensive chemical reaction coefficient k0 to obtain the value of the shape factor phi of the particle swarm. The determining method disclosed by the invention has the very important meanings on the mutual correlation of macroscopic experiment data and chemical reaction parameters aiming to the completion of a theoretical system of solid characteristics and a liquid-solid two-phase reaction.

The invention discloses a manufacturing method for a 3D printing garment fabric. The manufacturing method comprises the following steps: utilizing computer 3D design software to perform shoe upper digital modeling; planning a printing layer number, a printing line size and a spacing distance according to motion needs, and tightly regulating special lines of a local material to be more fit to a body of a user; using software of a 3D printer to plan a printing path, manually setting the size of a printing spray head, a printing temperature and printing speed, guiding a digital model into the 3Dprinter to start printing; and sewing after standing and hardening. The garment fabric disclosed by the invention is strong in functionality, is easy to manufacture, is energy-saving and environmentally friendly, and is manufactured by a 3D printing technology; special lines of the local material are tightly regulated to be more fit to a body of a sport fan according to body shape needs, so that press on neck and arm arteries is avoided. Meanwhile, gas permeability of the 3D printing garment fabric exceeds that of a conventional woven fabric, so that the inner part of the garment is preventedfrom being moisturized and gaining weight as a result of sweat absorbing.

The invention provides a data processing method, device and system based on a target account, and server side equipment, relates to the technical field of data processing, and solves the technical problem of relatively low use efficiency of a CRM system due to the fact that the CRM system cannot synchronize customer information registered by an official website account. The method comprises the following steps: receiving a registration request for a target website system, and determining a target account based on the registration request; sending the information of the target account to a CRMsystem specified by the target website system based on a preset specified relationship, so the CRM system establishes related information associated with the target account based on the information ofthe target account; receiving a message that the establishment of the related information sent by the CRM system is completed, and determining that the registration request is successful.

The invention discloses an open type oil tank for preventing oil pump from sucking air in an inclined swinging state. The oil tank comprises an oil tank body, an oil suction area and an oil supply area are arranged in the oil tank body, the oil suction area is located in the center area, the oil supply area surrounds the outside of the oil suction area, an oil pump oil suction pipe is arranged inthe center of the oil suction area, a one-way oil inlet opened towards the oil suction area in a one-way mode is formed in the bottom of the oil suction area, and an oil outlet is formed in the bottomof the outer part of the oil tank body; the oil supply area comprises a first oil supply area, a second oil supply area, a third oil supply area and a fourth oil supply area; the first oil supply area, the second oil supply area, the third oil supply area and the fourth oil supply area are in communication with one another through bottom through holes and a top space; and the first oil supply area, the second oil supply area, the third oil supply area and the fourth oil supply area are located on the outer side of the oil suction area, surround the oil suction area and are in communication with the oil suction area through the one-way oil inlet and the top space. The open type oil tank is simple in structure, low in cost and reliable in performance.