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50results about How to "Reliable fixing method" patented technology

Compression hemostasis device for quickly fixing limbs

The utility model relates to the technical field of hemostasis tools, in particular to a compression hemostasis device for quickly fixing limbs, which comprises an arc-shaped plate, an opening is arranged in the middle of the arc-shaped plate, a compression rod is arranged in the opening, a sterile gauze wrapping block is mounted at the bottom end of the compression rod, two ends of the arc-shaped plate are connected with elastic bandages, and through holes are arranged at two ends of the arc-shaped plate. A rack is arranged on one side of the compression rod, and a buckle is installed at the position, close to the rack, of the arc-shaped plate and matched with the rack in a clamped mode. According to the compression hemostasis device for rapidly fixing the limb, the design of the arc-shaped plate and the compression rod is adopted, the compression hemostasis device can be rapidly fixed to the injured limb, tedious winding and knotting are not needed, and therefore the treatment time is greatly saved. The sterile gauze wrapping block in the device can be in direct contact with a wound, a clean hemostasis environment is provided, and infection is prevented. In addition, due to the detachable connection mode of the gauze wrapping block and the compression rod, the use convenience and sanitation are improved.
Owner:THE FIRST AFFILIATED HOSPITAL ZHEJIANG UNIV COLLEGE OF MEDICINE

Anti-stretching auxiliary device for replacing pipeline component

The utility model relates to the technical field of mechanical engineering, and discloses an anti-stretching auxiliary device for replacing pipeline components, which comprises two rigid supports, upper screw rods are slidably mounted on two sides of the interiors of the two rigid supports, and two ends of each upper screw rod penetrate through the interiors of the two rigid supports. A part penetrates through the upper hoop and the lower hoop on the two sides, the lower hoop is attached to the part, the nut is rotated to achieve reverse self-locking, the fixing mode is quite reliable, the part can be prevented from loosening, the upper hoop and the lower hoop surround and clamp a pipeline, the expansion amount caused by thermal expansion and cold contraction can be effectively reduced, the stability of a pipeline system is guaranteed, and the pipeline is prevented from being damaged. And finally, the whole replacement process is convenient, efficient, time-saving and labor-saving, the working efficiency can be improved, the labor cost can be reduced, the labor intensity can be reduced, the quality and speed of pipeline maintenance work can be improved, and the service life of the pipeline can be prolonged.
Owner:LONGHUA XINCUN MINING CO LTD

Model test system for studying critical conditions of instability of vegetated slopes under rainfall

ActiveCN111289727BReliable fixing methodFlexible use of spaceVegetationSoil science
The present invention discloses a model test system for studying critical conditions for instability of a vegetated slope under rainfall, wherein a vegetated slope model is provided in a centrifugal environment double-layer seepage model box; a graded rainfall feedback simulation system simulates the requirements of specific rainfall intensity and duration, and induces changes in the internal moisture field conditions of the vegetated slope model; an artificial root strain analysis system simulates the physical soil consolidation effect of the root system on the slope surface and the regulating effect of matrix suction; a high-speed camera system for slope surface cracks records the entire rainwater infiltration and slope surface scouring of the test slope, and clearly captures the entire process of development, extension and penetration of slope surface cracks; a rock and soil moisture content monitoring system realizes the response of the slope moisture field in real time under different rainfall and artificial root working conditions. The present invention is used to carry out model tests for studying critical conditions for instability of a vegetated slope under rainfall conditions, and provides an effective testing means for evaluating the influence of vegetation on slope stability under rainfall conditions.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI

A winding apparatus for the production of a protective film

ActiveCN224590366Ureduce escapeSpray evenly
The utility model provides a kind of winding equipment for protective film production, comprising: pedestal, pedestal upper end is sequentially provided with film pressing roller group, spraying assembly, blowing assembly and tension keeping assembly from left to right, and the right end of pedestal is provided with winding roller assembly.The kind of winding equipment for protective film production, by being provided with spraying assembly, can be made to make protective film even spray on spray and avoid the liquid after a large amount of mist cooling on pedestal, by being provided with tension keeping assembly, can be made to keep the effect of protective film tension.
Owner:DONGGUAN YUANXIN PACKING PROD CO LTD

Heat furnace real-time sampling mechanism and method

The invention relates to the relevant technical field of heat furnace real-time sampling, in particular to a heat furnace real-time sampling mechanism and method.The heat furnace real-time sampling mechanism comprises a material taking tank, a material taking pipe, a material taking pump and a discharging pipe and is characterized in that the material taking pipe is connected to the upper surface of the material taking tank, and the material taking pump is fixedly connected to the surface of one side of the material taking pipe; a discharging pipe is connected to one side of the surface of the material taking pump, the outer side surface of the material taking pipe is sleeved with a filtering mechanism, a sealing mechanism is arranged on the upper surface of the material taking tank, and a fixing mechanism is arranged on the inner side surface of the material taking tank. According to the real-time sampling mechanism and method for the heating furnace, materials in the heating furnace can be rapidly extracted to the filtering tank, impurities are effectively filtered through the filtering net, the filtering net can be cleaned for continuous use after being full, the sealing structure ensures no leakage in the process, connection is firm and reliable, the sampling accuracy and reliability are improved through the mechanism, operation and maintenance are convenient, and the practicability is high. Powerful support is provided for quality control and process optimization of heat furnace production, and the production efficiency and the product quality are improved.
Owner:GUANGDE JIUXING MOIECULAR SIEVE CO LTD

Compressor of vending machine and disassembly and assembly method thereof

The invention relates to the technical field of compressor installation, in particular to a compressor of a vending machine and a disassembling and assembling method of the compressor. A goods outlet module installed on a vending machine shell is arranged at the front end of a compressor box body, and inclined rods are fixedly arranged on the faces, away from the front end of the vending machine shell, of the two sides; stress rods are fixedly arranged at the ends, close to the front end of the vending machine shell, of the inclined rods on the two sides, rotating shafts are arranged at the joints of the inclined rods and the stress rods and rotationally connected to the compressor box, and rolling wheels are rotationally arranged at the ends, away from the stress rods, of the inclined rods. The upper end and the lower end of the stress rod are each provided with a stress column fixedly connected to the compressor box. The stress rod is pulled upwards, at the moment, the stress rod and the inclined rod can rotate along with the rotating shaft, after the upper end of the stress rod abuts against the stress column, the idler wheel at the tail end of the inclined rod can make contact with the inner bottom face of the vending machine shell, the compressor box body inclines integrally, the stress rod is pulled, and the compressor box body can slide out more easily through sliding of the idler wheel.
Owner:SHENZHEN CHUANGHEJIA INFORMATION TECH CO LTD

Cable clamp for cable installation

The utility model relates to the technical field of cable installation, and discloses a cable clamp for cable installation, which comprises a fixing seat and a fixing mechanism, the fixing seat is rotatably connected with a driving threaded rod, one end of the driving threaded rod is fixedly connected with a first driving knob, and the other end of the driving threaded rod is rotatably connected with a fixing block. The driving threaded rod is in threaded connection with a threaded block, the threaded block is hinged to a connecting rod, the connecting rod is hinged to an extension rod, the extension rod is fixedly connected with a sector gear, the sector gear is rotationally connected with the fixing base, the sector gear is meshed with a transmission rack, and the fixing base is provided with a first limiting sliding groove. According to the cable clamping device, rapid clamping of a cable is achieved by rotating the first driving knob and driving transmission of the threaded rod, the threaded block, the connecting rod, the extension rod and the sector gear, and compared with a traditional manual holding mode, the mode not only improves working efficiency, but also ensures stability and safety of cable clamping.
Owner:WUHAN TUODA SIFANG ENVIRONMENTAL TECH CO LTD

Cathode protection device convenient to replace

ActiveCN222332064UExtended service lifefunctionality is not affectedReliable transmissionMechanical engineering
The utility model discloses a cathode protection device convenient to replace, which is mounted in an access hole reserved in a tank body needing to be protected and comprises a device main body, the device main body is communicated with the tank body, a valve body is mounted at the communication position, an anode module is mounted in the device main body, and a connecting module comprises a bolt, sealing rubber and a contact elastic sheet. The anode module comprises an anode block, a pressing plate, a stainless steel spring and a fixing device. According to the cathode protection method adopting the sacrificial anode, the service life of the structure can be effectively prolonged; the device and the protected tank body are connected through the elastic contact piece, so that a reliable transmission channel is provided for charges; the anode block is fixed on the cathode protection device through the pressing plate, the stainless steel spring and the fixing device, and a reliable fixing mode is achieved.
Owner:WUHAN FUND ENVIRONMENT PROTECTION

A lubricating oil detection sampling device

The utility model discloses a lubricating oil detection sampling device relates to sampling device technical field, in view of the lack of flexibility in prior art structure design, it is difficult to adapt to the sampling demand under different working conditions and the control precision of sampling volume is insufficient problem, present and propose the following scheme, including fixed shell, the bottom welding of fixed shell one side outer wall has the first fixed plate, and one end welding of first fixed plate has the pipe clamp and inserts the sampling pipe of fixedly having, the top welding of fixed shell one side outer wall has the second fixed plate. The utility model discloses through setting up the connecting mechanism, its unique structure design allows the rotary connection of connecting plate to be connected, and adjacent connecting mechanism can realize annular combination and parallel combination through the rotating rod. This innovative design makes sampling device when facing complex equipment layout and different sampling position demand, can show outstanding flexibility and adaptability.
Owner:EDSON (ANHUI) TECHNOLOGY CO LTD

A cooling water pipeline structure

This utility model discloses a cooling water pipeline structure, belonging to the field of chemical technology. It includes an electric furnace body, with a cooling water pipe wound around its outer surface. An outlet pipe is located at the lower side of the cooling water pipe, and an inlet pipe is located at the upper side of the cooling water pipe. An external pipe connection and fixing mechanism is provided at the other end of both the inlet and outlet pipes. This utility model achieves rapid connection and fixing of the external pipe and the cooling water pipe through this external pipe connection and fixing mechanism. Its unique plug and slot design, combined with the locking mechanism of the inclined plug and spring, allows the external pipe to be quickly installed without complex tools and cumbersome steps, greatly saving installation time and labor costs. At the same time, this fixing method is firm and reliable, effectively avoiding cooling water leakage caused by unstable pipe connections and ensuring the stable operation of the cooling system.
Owner:WUHAN XINKANG CHEM EQUIP CO LTD

Installation cleaning device and photovoltaic robot

The invention relates to the technical field of photovoltaic equipment, and discloses an installation cleaning device and a photovoltaic robot, and the installation cleaning device comprises a control assembly which comprises a control arm and a control structure, and the control arm is provided with a connecting structure arranged on a movable arm; the transfer assembly is provided with a first quick-change structure and a fixing structure; the cleaning assembly is arranged on one side of the control assembly and provided with a second quick-change structure and a cleaning structure, the control arm is connected with the first quick-change structure of the transfer assembly through the connecting structure of the control arm, carrying operation can be carried out, and when the photovoltaic module needs to be cleaned, the control arm separates the connecting structure of the control arm from the first quick-change structure; the carrying function and the cleaning function can be efficiently achieved at the same time through one device, and compared with worker operation, the photovoltaic module carrying device has the advantages of being high in operation efficiency and automation degree, capable of reducing the damage rate of photovoltaic modules and the like.
Owner:SANHE ROBOT TECH CO LTD

A pulverizer provided with a quick-mounting screen

The utility model discloses a kind of quick-mounting screen setting grinder, including grinder body and quick-mounting screen, quick-mounting screen is introduced from the side end installation of grinder body, the bottom position of grinder body side end is provided with screen pressing handle, grinder body side end top is equipped with screen positioning plate and fastener is connected on screen positioning plate, locking block is fixedly installed on the bottom net body of quick-mounting screen, fixed aperture is set on the upper end net body of quick-mounting screen. Through the above mode, the utility model can efficiently replace screen, the bottom of grinder body is increased screen pressing handle, quick-mounting screen is provided with fixed aperture and locking block, when screen is installed, quick-mounting screen is slid to bottom along screen pressing handle, after screen pressing handle is pressed down, front part is lifted and hits locking block, then quick-mounting screen is pulled to the screen positioning plate of equipment, quick-mounting screen can be fastened using screw, both ends of screen are firmly fixed by the above ingenious design, and the fixing mode is quick and simple, firm and reliable.
Owner:WUXI BEISIER PRECISION MASCH CO LTD

Simulation circuit breaker for detection

The utility model discloses a simulation circuit breaker used for detection, comprising a box body, the front side of the box body is provided with a detachable front side plate, the box body is provided with a detection shaft, and the rear side of the box body and the detachable front side plate are provided with shaft holes used for installing the detection shaft; a guide block is arranged at the top of the box body, an arc-shaped rod is arranged on the guide block in a penetrating mode, a limiting ring is arranged at one end of the arc-shaped rod, a U-shaped bayonet is formed in the other end of the arc-shaped rod, and a spring is arranged on the arc-shaped rod and located between the guide block and the U-shaped bayonet. According to the utility model, the switch is installed on the box body through the detection shaft, the handle part of the switch is fixedly provided with the U-shaped bayonet, when the switch rotates, the switch drives the arc-shaped rod to move through the switch, so that the spring is compressed, in the opening and closing process of the switch, the received spring resistance is larger and larger, and through scale values on the angle disc, the angle of the arc-shaped rod is measured. The rotation angle of the switch is observed, and when the switch rotates to the scale value corresponding to the opening and closing strength, simulation of the opening and closing strength in the working process of the switch is achieved.
Owner:CHENGDU ZHIDA POWER AUTOMATIC CONTROL CO LTD

Mounting bracket for additionally arranging grounding carbon brush on wind driven generator

The utility model belongs to the technical field of wind driven generators, and particularly relates to a wind driven generator mounting bracket additionally provided with a grounding carbon brush, which comprises two right-angle brackets, a fixed cross beam is arranged at one ends of the two right-angle brackets, a brush holder fixing seat is arranged on one side of the fixed cross beam, the grounding carbon brush is arranged at one end of the brush holder fixing seat, and the grounding carbon brush is arranged at the other end of the brush holder fixing seat. And a mounting hole is formed in the end part of the right-angle bracket. A bolt penetrates through a through hole in one end of a right-angle support to fix the right-angle support on a bolt hole of a generator end cover, a fixing bolt penetrates through oval holes in the two ends of a fixing cross beam to enable a fixing nail to be connected with screw holes in one ends of the two right-angle supports, and one end of a brush holder fixing seat is connected with a threaded hole in the middle of the fixing cross beam. The grounding stainless steel ring is installed on the generator front-end rotating shaft, the whole position is adjusted to enable the brush holder fixing seat to be parallel to the central axis of the generator front-end rotating shaft, the whole set of support installation is completed, and therefore the problem that the auxiliary grounding carbon brush cannot be reliably installed on an original generator is solved.
Owner:ZHONGMINFUQING WIND POWER CO LTD

Improved bidirectional anti-slip wheel stopper

An improved bidirectional anti-slip wheel stopper comprises a wheel stopper base, a wheel stopper block and a handle, the wheel stopper block is detachably fixed on the wheel stopper base through a plurality of fastening bolts, and the handle is fixed on the wheel stopper base through a fixing bolt. The wheel stopper base comprises a base plate, a front side wing, a rear side wing and a supporting handle which are welded and fixed into a whole, the base plate is located at the bottom to be arranged on a steel rail, the front side wing and the rear side wing are of a symmetrical structure and are welded and fixed to the two sides of the base plate respectively, and the supporting handle is welded and fixed to the outer side of the front side wing to fix the handle. A plurality of fastening bolts sequentially penetrate through the front side wing, the wheel stopping block and the rear side wing to be fixed. The two ends of the wheel stopping block are of a symmetrical structure and form stopping arc faces respectively, and therefore the double-side using function is achieved. Therefore, the two-way anti-slip device is simple in structure, convenient to operate, capable of achieving two-way anti-slip on the track, capable of better protecting wheels, convenient to replace and maintain and wider in application range.
Owner:ZHEJIANG TIANTIE SCIENCE & TECHNOLOGY CO LTD

High-power multi-tab pole-free water-based lithium battery

The utility model discloses a high-power multi-tab pole-free water-based lithium battery, which comprises an outer shell, a metal shell, a positive electrode, a negative electrode, a positive electrode interface and a negative electrode interface, the positive electrode and the negative electrode are welded on the shell, the positive electrode is connected with the positive electrode interface, and the negative electrode is connected with the negative electrode interface; the battery structure is changed into an integrated non-diaphragm arrangement, so that electrolyte, namely liquid, can be in indirect contact with the metal shell effectively, the heat dissipation efficiency can be effectively improved after the arrangement, and a further monitoring temperature generation zone can be easily monitored and analyzed; and a multi-tab effect can be formed by connecting the negative electrode with the shell, so that the assembly and arrangement mode is simpler.
Owner:ORIENTAL SMART LION ENERGY STORAGE BATTERY LTD

Gas ignition device with extended nozzle

ActiveCN222459563UGood self-heating effectReliable fixing methodFuel lightersPhysicsNozzle
The utility model discloses a gas ignition device with an extended nozzle, the extended nozzle is fixed on one side of the upper end of a device main body, the extended nozzle comprises a long pipe and a sleeve, the rear end of the long pipe is a closed end and is provided with a connecting block and an interface, and the long pipe at the front end of the connecting block is provided with a limiting ring and a plurality of arc-shaped bumps; the side wall of one of the protruding blocks is further provided with an air inlet hole, the front end of the long pipe is provided with a spray head body with a limiting groove, the long pipe is sleeved with the sleeve, the rear end of the sleeve abuts against the limiting ring, a plurality of through holes are further formed in the sleeve in an array mode, and a circle of fixing ring is further arranged on the periphery of the sleeve. A connecting column connected with the connecting block and a bearing plate fixedly provided with a connector are arranged in the device body, the connector is connected with the connector and the gas container, and the end of a wire of the igniter penetrates through the limiting ring, extends to the nozzle body and is inserted into the heat insulation sleeve. And the extended spray head is not easy to fall off and has a better self-heat-dissipation effect.
Owner:ZHEJIANG SHUNLI PACKAGING CO LTD

Hydraulic support test bed protection side loading test device

The utility model relates to the technical field of side protection loading tests, in particular to a side protection loading test device for a hydraulic support test bed, which comprises a main body part, a flitch is arranged above the main body part, the other side of the flitch is fixed with a top beam of the test bed, and a plurality of groups of connecting lug plates are fixed on one side surface of the flitch. Two hinge holes are formed in each set of connecting lug plates, one side face of the main body part is hinged to the connecting lug plates by arranging first hinge shafts in the hinge holes, an auxiliary connecting part is hinged to the lower end of the other side face of the main body part, and a T-shaped groove lug plate is hinged to the other end of the auxiliary connecting part. The device has the advantages of being simple in structure, high in test strength and reliable in fixed connection mode.
Owner:ZHENGMEIJI ZHIDING HYDRAULIC CO LTD

Head-mounted device

The utility model discloses a head-mounted device, which comprises a helmet main body, an electrode tip and an annular fixing piece, and is characterized in that the inner wall of the helmet main body is provided with a first assembly structure; the electrode tip is connected with the helmet main body; the end, making contact with the helmet body, of the electrode tip is bent to form an outer flange, and a limiting channel is formed in the position, right opposite to the first assembling structure, of the outer flange. The annular fixing piece is nested on the electrode tip and is used for covering the outer flange; and a second assembly structure is arranged on the annular fixing piece, penetrates through the limiting channel, is in butt joint with the first assembly structure and is used for clamping the outer flange, so that the electrode tip is fixed on the helmet main body. The first assembling structure is connected with the second assembling structure, so that the annular fixing piece and the helmet body are connected into a whole, the outer flanging is pressed, and therefore the electrode tip is fixed, the structural stability is high, and long-term use is facilitated.
Owner:SHENZHEN PANBRAIN TECHNOLOGY CO LTD

A safety-type busbar digital system

A safe busbar digital system is disclosed, comprising a busbar, a plug-in box, a starting box, a terminal cover, and busbar hoisting components. The system is characterized in that one end of the busbar is connected to the starting box, and the other end is fixedly fitted with the terminal cover. The top of the busbar is hoisted to the wall using the busbar hoisting components, and the bottom is plugged into the plug-in box. This invention features high overall structural strength, simple and rapid installation, high overall structural safety, simple component manufacturing processes, and low overall production cost.
Owner:ZHENJIANG GARDERMOEN INTELLIGENT POWER TECH CO LTD

A detachable battery scooter

ActiveCN224589290UConvenient charging operationEasy and convenient to take out the battery
The utility model discloses a detachable battery's scooter, detachable battery's scooter includes frame pipe, battery, front fixed seat, battery lock, rear fixed seat and terminal, frame pipe hollow setting and top are equipped with the strip gap and form the cover pipe of missing, and battery is detachably placed into the cover pipe of missing, and the both sides of battery are restricted by frame pipe pipe body, the top of battery is flush with the top of cover pipe of missing and no longer sets up frame pipe cover plate, and the front fixed seat is fixedly arranged in the inside of frame pipe front end, is used for with battery front end joint, is provided with battery lock on front fixed seat, and the key hole of battery lock is located frame pipe side, and the lock tongue of battery lock is inserted with battery front end and is limited to go up and down activity, and the rear fixed seat is fixedly arranged in the inside of frame pipe rear end, is used for with battery rear end joint, and is provided with terminal on rear fixed seat, and battery rear end is connected with terminal and supplies power. The utility model has the advantages of convenient battery dismounting, reliable fixation, coordinated modeling, simplified structure etc.
Owner:盐城快轮智能科技有限公司

Multi-hole distributed closed mounting structure of automobile seat ventilation system and automobile seat

The invention provides an automobile seat ventilation system porous distributed closed mounting structure and an automobile seat, and the automobile seat ventilation system porous distributed closed mounting structure is characterized in that a closed air guide assembly is arranged at each air distribution hole, each closed air guide assembly comprises an air guide part matched with a ventilation hole, and a mounting part is arranged at the end, close to a ventilation bag, of each air guide part; the fixing device is used for fixing the closed air guide assembly to the ventilation bag. At least one layer of connecting structure is arranged on the outer wall surface of one end, far away from the mounting part, of the air guide part in the first direction and the circumferential direction, and is used for embedding the air guide part into the corresponding ventilation hole, so that the outer wall surface of the air guide part is hermetically connected with the inner wall surface of the corresponding ventilation hole, and the ventilation bag is mounted on the foam layer; a hollow cavity communicating with the first cavity is formed in the air guide part, a first air outlet communicating with the hollow cavity is formed in the end, away from the mounting part, of the air guide part, and when the air guide part is embedded into the corresponding ventilation hole, the air distribution hole, the ventilation hole and the first air outlet are coaxially formed. A reliable fixing mode is provided for the ventilation bag.
Owner:HEBEI AEW AUTO PARTS CO LTD

Anti-falling device of optical fiber amplifier

The utility model discloses an anti-drop device of an optical fiber amplifier, which comprises an amplifier body, the amplifier body is connected to external equipment, the amplifier body is provided with a protection mechanism, and the protection mechanism comprises a fixing sleeve, an insertion rod, an anti-drop plate, a limiting block, a raised plate, a return spring, a positioning rod, a clamping mechanism and an unfastening mechanism. A fixing hole is formed in the amplifier body, a fixing sleeve is connected into the fixing hole in a threaded mode, the protection mechanism provides efficient and reliable protection measures for the optical fiber amplifier, an anti-falling plate is installed on an insertion rod, and a return spring and a protruding plate jointly act between the insertion rod and the fixing sleeve, so that an elastic connection mode is achieved; according to the design, when the optical fiber amplifier is subjected to external impact, impact force can be effectively absorbed and dispersed, the problem of breakage caused by rigid connection is avoided, and therefore the impact resistance and use safety of equipment are remarkably improved.
Owner:SHANDONG WANSHUO PHOTOELECTRIC EQUIP CO LTD

Antioxidant filtrate impurity adsorption device

The utility model discloses an antioxidant filtrate impurity adsorption device, which relates to the technical field of chemical engineering and comprises a shell and a filter element, an end cover is arranged on the upper surface of the shell, a connecting cover is rotatably connected to the annular side surface of the end cover, and a fixing block is arranged on the annular side surface of the connecting cover. Limiting of the connecting cover and the shell is opened by rotating the screw upwards, the connecting cover can rotate at the moment, the connecting cover is rotated upwards to drive the connected end cover to move together, the connecting cover and the end cover can be disassembled at the moment, the filter element fixed between the shell and the end cover is extruded to be replaced, and the filter element convenient to replace can greatly shorten the maintenance time; according to the utility model, the stop time of the device is reduced, and a more reliable fixing mode is provided by double limiting, so that the filter element can bear higher pressure and water flow impact in the filtering process and is not easy to displace or shake, and the overall reliability is improved.
Owner:HUBEI PRETTY CHEM TECH CO LTD