38results about How to "Smooth introduction" patented technology

The invention discloses an automatic control device of drop transfusion system, which consists of lye storage and float in the lye storage, wherein the liquid-in needle (1) with liquid-in opening (2) and vertical convex area (3) toward intracavity with liquid-out opening (4); the float contains cylindrical floater (5) and soft elastomer sealer (8). There is longitudinal gap between sealer (8) and vertical convex area (3) that matches each other. The invention provides a precise and reliable sealed transfusion system with automatic closing system effectively, which can be applied in the medical treatment domain widely.

The invention discloses a steam generating device with a steam recovery function and a vapor-liquid separation function. The device comprises a steam regeneration tank, an electric heating device andan air return pipe; the top of the steam regeneration tank is connected with a regenerated steam extraction pipe, the regenerated steam extraction pipe is connected with and communicates with a steamoutput pipeline of a steam boiler, and the bottom of the regenerated steam extraction pipe is provided with a steam regeneration tank pollution discharge interface; the electric heating device is arranged at the lower side part of the steam regeneration tank and extends into a tank cavity; one end of the air return pipe is fixed to the side part of the steam regeneration tank, and the middle partand the other end of the air return pipe are connected with a steam utilization device through branch pipes; and the device is characterized by further comprising a vapor-liquid separation mechanism which is arranged in the tank cavity, and one end of the air return pipe extends to the vapor-liquid separation mechanism and is in a state of being protected by the gas-liquid separation mechanism. According to the device, the utilization effect of the recovered steam is improved; the steam production efficiency of the steam regeneration tank is improved, and the electric energy consumption of thesteam regeneration tank is saved; a recovery pipe is prevented from being affected by the steam pressure of the steam regeneration tank, so that the recovered steam can be smoothly introduced into the steam regeneration tank while the vapor-liquid separation is carried out on the recovered steam; and the structure is simple, and manufacturing and maintenance are convenient.

The invention provides a refrigerating appliance (100), which comprises a heat insulation case body (10) and a door (11), wherein a storage room is formed in the heat insulation case body (10); the door (11) is matched with the insulation case body (10) so as to selectively open or close the storage room. The refrigerating appliance (100) also comprises a distribution system (20) capable of distributing ice and fluid. The distribution system (20) can be used for distributing the ice in an ice storage container in the refrigerating appliance (100) into a distribution cavity (21). The distribution system (20) comprises an ice channel (40) and a splash-proof component (30), wherein the splash-proof component (30) comprises a buffer part used for at least absorbing part of kinetic energy of ice when the ice passes so as to reduce the phenomenon that the ice is diffused and splashed.

The invention provides a kawo kawo fiber and cotton fiber blended down-proof and anti-mite fabric and a weaving method for the same and relates to the technical field of textile production. The kawo kawo fiber and cotton fiber blended down-proof and anti-mite fabric is weaved via warp yarns and weft yarns. The warp yarns and the weft yarns are blended via kawo kawo fibers and cotton fibers; the weight percentage of the kawo kawo fibers is 20% to 30%; the weight percentage of the cotton fibers is 80% to 70%; the number of the warp yarns is 14.5tex; the number of the weft yarns is 9.7tex; and the fabric is in a plain weave structure. The weaving method comprises the following steps of a spooling procedure, a warping procedure, a slashing procedure, a denting procedure, a weaving procedure and a finishing procedure. Blended yarns formed by the kawo kawo fibers and the cotton fibers at a rational ratio are employed and weaved to form bedding article fabric with natural down-proof and anti-mite effects as well as great downproofness and great moisture absorbing and ventilating performance; the textile structure is tight, plain and fine and has smooth hand feeling and gloss; the fabric is ventilating and downproof and anti-mite as well as firm and abrasion-resistant; and great comfortableness and warming effect can be achieved.

Provided is a method for pulling in a restoration pipe that makes it easy to assess whether a restoration pipe with the largest possible diameter can be pulled into an aging drainage channel, and that enables the restoration pipe to be pulled in through a gap that is smaller than a sewer pipe. This method for pulling in a restoration pipe involves: preparing a dummy restoration pipe (30') that simulates a restoration pipe; attaching, to the insertion-side tip of the dummy restoration pipe (30'), an assessment jig (10) for assessing whether a restoration pipe can be pulled in; pulling the assessment jig (10) with the dummy restoration pipe (30') into an existing pipe (1); confirming that the assessment jig (10) with the dummy restoration pipe (30') has passed all the way through; and then attaching a pull-in jig to the tip of a restoration pipe, inserting the pull-in jig with the restoration pipe into the existing pipe (1) from a top opening (2b) of the existing pipe, and pulling the pull-in jig with a wire, thereby positioning the restoration pipe along the entire length of the existing pipe.

The invention relates to a high-altitude cable. The high-altitude cable comprises an oil absorbing layer, a fireproof layer, and a wire core layer, an insulation layer, a first heat conducting layer, a shielding layer, a waterproof layer and a second heat conducting layer, which successively sleeve the oil absorbing layer from inside to outside. Insulation heat conducting liquid is absorbed on the oil absorbing layer. The wire core layer comprises electric wires which are annularly distributed along the radial cross section of the cable, and heat conducting materials filling the gaps between the electric wires. Each electric wire comprises a wire core and an insulation rubber layer wrapping the exterior of the wire core. Multiple long strip-shaped cambered surfaces extending in the length directions of the cables are uniformly arranged on the outer circumferential face of the second heat conducting layer. The cambered surfaces are distributed on the radial cross sections of the cable in a polygonal manner. The middle parts of the radial cross sections of the cambered surfaces are inwards recessed towards the center of the cable. Two sides of middle parts of the radial cross sections of the cambered surfaces outwards protrude towards the exterior of the cable. According to the invention, by effectively using rain and wind outdoors, heat dissipation can be performed on the cable itself, thereby turning the harm into a benefit, so the service lifetime of the cable is effectively prolonged.

The invention discloses a quick-transport tunnel sampling soft-bodied robot with a clamping structure and relates to the technical field of soft-bodied robots. The quick-transport tunnel sampling soft-bodied robot with the clamping structure specifically comprises a framework and a body, wherein a slide groove passes through and is disposed on side faces of the framework; a buffer laminated plateis firmly connected to the left side face of the framework; a movable block is disposed in the slide groove; an diagonal-stay telescopic rod is embedded in the left wall of the movable block; a sleevebase is disposed on the outer side of the upper end of the framework; a first telescopic rod is welded to the left wall of the sleeve base; a second telescopic rod is placed above the first telescopic rod; the right end of the second telescopic rod is welded to the left wall of the sleeve base; an air pressure control box is connected to the bottom end of the framework in an integral manner; anda supporting block is disposed on the right end of the body in an integral manner. The quick-transport tunnel sampling soft-bodied robot with the clamping structure is characterized in that a supporting frame structure of the whole robot is formed by the framework; and through slide fitting between the movable block and the slide groove, the movable block can be moved vertically based on the framework.

The invention relates to a passive advanced pressurized water reactor coolant pump installation technology. The passive advanced pressurized water reactor coolant pump installation technology is characterized in that a main pump occasional passage is provided; before a main pump is introduced to a nuclear island workshop, butt joint between a flat car transporting the main pump and the main pump occasional passage is completed; a draw gear is used to introduce a main pump / transport towing bracket assembly embarked on a mobile device to the nuclear island workshop; during the drawing process, a tail slipping device is used to prevent the moving speed becoming too fast, and then the main pump is moved to a turnover initial position; a ring crane hook is lifted and coordinates with moving of the mobile device so as to turnover the main pump, and at the same time, a tow rope of the tail slipping device is adjusted; the main pump is lifted to a steam generator cavity, and is located in a main pump installation mechanical device; a suction adapter in a pump housing completes the installation work before installation of the main pump; the main pump installation mechanical device is utilized to provide moving, positioning, adjusting and lifting of the main pump; and a sealing ring at the upper part of the main pump and the pump housing directly utilize the welded sealing technology to realize prevention of leakage during the operating process.

The invention discloses a high-stability steel plate processing device which comprises a steel plate conveying device, a working platform, a plate cutting knife and a vertical hydraulic cylinder, wherein taking the conveying direction of materials as the front, distances between upper feed rolls and lower feed rolls are gradually reduced from the back to front; the working platform is flush with the plane where the upper edges of the lower feed rolls are located, and is positioned at front of the lower feed rolls; the plate cutting knife is arranged above the rear edge of the working platform, and is fixedly mounted at the end part of a piston rod of the vertical hydraulic cylinder; and a pressure plate for pressing the formed materials and an air cylinder for driving the pressure plate to vertically lift are arranged at the front of the plate cutting knife. The high-stability steel plate processing device has the benefits that the efficiency is improved; the manpower is saved; and smooth leading-in and conveying of plates of different thicknesses can be realized.

The invention discloses an insect trapper comprising a bottom plate C, an insect inlet channel A, an insect fetching cover plate B, a side wall face D, a fixed face E and a top cover F, wherein the bottom plate C is a circle with an incision and is provided with an insect inlet hole c1 and an insect fetching hole c2; the insect inlet channel A is a four-edge body with a narrow upper opening and a wide low opening and is mounted on the incision of the bottom plate C; the insect fetching cover plate B is mounted on the insect fetching hole c2; a side wall face E is a non-closed inclined taper defined by sectors; two sides of an opening are respectively provided with one pair of rectangular sockets d1; the fixed face E is rectangular and two long edges and the two sides of the opening of the side wall face E are closed; the middle parts of the two long edges are inwards bent; the two long edges are respectively provided with two rectangular fixing handles e1; each handle is provided with a circular hole; and the top cover F is the circle with the incision and an iron wire hook f1 is arranged at the center of the top cover F.

The invention discloses a cutting device applicable to plates with different thicknesses. The cutting device comprises a steel plate conveying device, a working platform, a plate cutter and a vertical hydraulic cylinder which is used for driving the plate cutter to move vertically; the steel plate conveying device comprises multiple lower material conveying rolls which are distributed horizontally and multiple upper material conveying rolls which are arranged above the lower material conveying rolls; the conveying direction of material is taken as the front, and the intervals between the upper material conveying rolls and the lower material conveying rolls are sequentially reduced from back to front; the working platform is flush with the plane on which the upper edges of the multiple lower material conveying rolls; the working platform is in front of the lower material conveying rolls; the plate cutter is arranged above the rear edge of the working platform; and the plate cutter is fixedly arranged on the end part of a piston rod of the vertical hydraulic cylinder. The cutting device has the beneficial effects that the efficiency is improved; the labor is saved; and the plates with different thicknesses can be smoothly fed and conveyed.

The invention relates to the field of manganese ore beneficiation, in particular to a low-grade manganese carbonate polymetallic ore multistage beneficiation device which comprises a magnetic separation box, and a plurality of horizontal magnetic separation rollers arranged at intervals from top to bottom. An inclined first bouncing board is arranged beside each magnetic separation roller, and a second bouncing board is arranged below each magnetic separation roller. One side of the first bouncing board directly faces the magnetic separation roller, the rotating direction of the magnetic separation roller always faces the clockwise direction of the first bouncing board, and transmission arms are arranged at the two ends of the magnetic separation roller respectively. One ends of the transmission arms are coaxially connected with the magnetic separation roller, and the other ends of the transmission arms can be in transmission connection with the first bouncing board and the second bouncing board. The upper half space part, corresponding to the first bouncing space, of the first bouncing board is a bent area, the transmission arms are used for driving the bent area to swing towards the magnetic separation rollers in a reciprocating mode through self bending, the transmission arms are used for driving the lower end of the second bouncing board to swing up and down. According to the present invention, the screening effect of each magnetic separation roller can be improved, and the screening missing probability can be effectively reduced.

The invention relates to a method for controlling the tower shape of steel coil. The method comprises the following steps that 1 ) the temperature difference between the upper surface and the lower surface after strip steel heating is controlled within the range of + / -15 DEG C; 2 ) before the rough rolling roll begins to roll and the roll level of the roll is checked, a center instrument curve isrolled according to the rough rolling R1, the horizontal of the actual roller is adjusted, and the operation side roller gap is adjusted by the rough rolling according to the finish rolling feedback;3 ) during finish rolling, when the strip steel is deviated from the transmission side, the roll gap of the rolling mill F1 is pre-raised by 0.08-0. 12 mm, the roll gap of the rolling mill F3 is pre-lifted by 0.10-0.15 mm, the roller gap of the last-frame rolling mill is pre-raised by 0.05-0.10 mm, when the strip steel is centered or deviated from the transmission side, and normal production is carried out; 4 ) when rough rolling material is carried out on the side bending of the transmission side, the additional value of the guide ruler is determined according to the abrasion degree of the guide ruler, adjusting is carried out between 0-8 mm, and the pressure coefficients on the two sides of the tension roller are adjusted from 0.75-1.5; and 5) the tower is carried out pressure shape treatment by using an online rolling device.

The invention discloses a high-precision machining process of a building steel plate. According to the high-precision machining process, a steel plate conveying device, a work platform, a plate shear knife and a vertical hydraulic cylinder are included; the material conveying direction serves as the front direction, the intervals between upper feeding rollers and lower feeding rollers are gradually reduced from back to front, the work platform is flush with the plane where the upper edges of the multiple lower feeding rollers are located, the work platform is located in front of the lower feeding rollers, the board shear knife is arranged above the rear edge of the work platform and fixedly mounted to the end of a piston rod of the vertical hydraulic cylinder, and a pressing plate for pressing a profile and an air cylinder for driving the pressing plate to ascend and descend are located in front of the plate shear knife. The high-precision machining process has the advantages that efficiency is improved, manpower is saved, and smooth introduction and conveying of plates different in thickness can be achieved.

The invention belongs to the technical field of medical consumables and relates to an elastic thread for thread-drawing therapy of perianal abscess and anal fistula. The elastic thread is characterized in that a number 0 is arranged at the central point of the elastic thread, and starting from the number 0, scales with the spacing of 0.5-1.0 cm are respectively arranged on the left part and the right part of the elastic thread; the numbers of the scales are gradually and respectively increased from the number 0 to the two tail ends of the elastic thread; the two tail ends of the elastic thread are fixedly connected with inelastic incoming threads; and each section of scales on the elastic thread is colored, and the colors of the scales are gradually and respectively changed from deep to light from the scale number 0 of the elastic thread to the two tail ends of the elastic thread. The elastic thread has the advantages that the elasticity is good, the property is stable, the operation is simple and convenient, the auxiliary reminding function is achieved, and assistance can be provided for doctors at the anorectal section to understand the conditions of patients more intuitively and accurately and the like.

The invention provides a stirring system of a stirring station, which comprises a tank body, a motor and a supporting platform, a supporting frame is erected on the bottom surface, the supporting platform is horizontally arranged on the supporting frame, the tank body is arranged on the supporting platform, the tank body is provided with a stirring cavity, the motor is arranged on the upper surface of the tank body, and an output shaft of the motor penetrates through the tank wall of the tank body, extends into the stirring cavity and is connected with a rotating shaft. A spiral impeller is wound on the rotating shaft, a discharge port is formed in the lower end of the stirring cavity, a supporting rod is arranged on the supporting platform, a plurality of material barrels are arranged on the supporting rod, the outer wall of the motor is fixedly connected with the material barrels, a material cavity of each material barrel is communicated with the stirring cavity through a vertical connecting barrel, and the vertical connecting barrel is provided with a control valve for controlling material passing. Materials enter the stirring cavity along the vertical communicating cylinder, the materials enter the stirring cavity through opening of the control valve, the motor drives the spiral impeller to rotate so as to drive the multiple materials in the stirring cavity to be stirred, and finally the materials are discharged from the discharging port.

The invention discloses an insect trapper comprising a bottom plate C, an insect inlet channel A, an insect fetching cover plate B, a side wall face D, a fixed face E and a top cover F, wherein the bottom plate C is a circle with an incision and is provided with an insect inlet hole c1 and an insect fetching hole c2; the insect inlet channel A is a four-edge body with a narrow upper opening and a wide low opening and is mounted on the incision of the bottom plate C; the insect fetching cover plate B is mounted on the insect fetching hole c2; a side wall face E is a non-closed inclined taper defined by sectors; two sides of an opening are respectively provided with one pair of rectangular sockets d1; the fixed face E is rectangular and two long edges and the two sides of the opening of the side wall face E are closed; the middle parts of the two long edges are inwards bent; the two long edges are respectively provided with two rectangular fixing handles e1; each handle is provided with a circular hole; and the top cover F is the circle with the incision and an iron wire hook f1 is arranged at the center of the top cover F.

The invention discloses a carbon graphite material, which has a connected hole structure. The preparation method of the carbon graphite material is as follows: put pitch coke, artificial graphite powder, and carbon black into a kneader for dry mixing and then hot mixing, then add molten modified pitch for wet mixing; then wet mix the paste The material is dried, crushed, and screened. The screened powder is evenly mixed with pitch-based pre-oxidized wire, and then shaped and roasted to obtain a carbon graphite material with a connected pore structure. The carbon graphite material of the present invention has a through-hole structure, which can realize the densification of homogeneous materials, realize the smooth introduction of functional materials, improve the comprehensive mechanical properties of the material, reduce the brittle fracture of the material, and realize the structural-functional integration of the structure; the through-hole Structured carbon graphite materials can be used in aerospace, transportation, chemical industry, mechanical energy and other fields.

The invention discloses a metallurgical high-concentration nitrogen oxide flue gas rotary treatment device which comprises a steel frame base, a protective base is fixedly mounted on the upper portion of the steel frame base in an embedded mode, an absorption tower is vertically mounted on the central axis of the upper portion of the protective base, and a maintenance window is integrally arranged on the surface of the front side of the absorption tower. A water tank is arranged on the right side of the protective base in parallel, a waste gas inlet is formed in the middle of the front side of the protective base, and a swing mechanism is mounted at the bottom in the absorption tower. According to the metallurgical high-concentration nitrogen oxide flue gas rotary treatment device , the swing mechanism and a transition absorption mechanism are arranged in the absorption tower at the same time, the transition absorption mechanism is filled with a large amount of inert gas, and when the nitric oxide flue gas enters a concentric-square-shaped pipe, the nitric oxide flue gas can be mixed with the inert gas; therefore, the oxygen in nitrogen oxides is consumed, in the subsequent treatment, the consumption of a catalyst in the filler layer is reduced, and the use of an ammonia agent in the filler is saved.

The invention discloses an automatic control device of drop transfusion system, which consists of lye storage and float in the lye storage, wherein the liquid-in needle (1) with liquid-in opening (2) and vertical convex area (3) toward intracavity with liquid-out opening (4); the float contains cylindrical floater (5) and soft elastomer sealer (8). There is longitudinal gap between sealer (8) and vertical convex area (3) that matches each other. The invention provides a precise and reliable sealed transfusion system with automatic closing system effectively, which can be applied in the medical treatment domain widely.

The invention discloses a self-disturbance small-particle-size dual-purpose mechanical and pneumatic combined type collecting and discharging device which comprises a seed box, a seed storage chamber, a seed unloading and collecting groove, a shaped hole wheel and a fan seed falling opening. The type hole wheel comprises a seed metering shaft and N type hole wheel single bodies which are mounted on the seed metering shaft along the axial direction of the seed metering shaft; a circle of sinking grooves are evenly distributed in each hole wheel single body in the circumferential direction, a hole is formed in the middle of each sinking groove, and a boss is formed between every two adjacent sinking grooves. The inclined parabolic holes and the boss seed disturbing structure are integrated in the hole wheel single body, compared with a seed disturbing-free device or an independent seed disturbing device, population disturbance can be increased, seed filling performance can be improved, and meanwhile the overall structure of the seed-metering device is simplified.

The invention discloses a liquid level detection device for water treatment tank equipment, and belongs to the technical field of liquid level detection. The liquid level detection device for water treatment tank equipment comprises a tank, an installation box, a communicating pipe and a liquid level pipe; the communicating pipe is connected to the bottom end of the tank through the installation box, the end, away from the installation box, of the communicating pipe is connected with the liquid level pipe, liquid level indicating scales are arranged on the liquid level pipe, a breakover mechanism is arranged in the installation box, one end of the breakover mechanism is connected with the tank, the other end of the beakover mechanism is in sealed connection with the communicating pipe, anda one-way valve is arranged on the communicating pipe. The liquid level detection device is convenient to operate; the connection stability of the communicating pipe and a breakover pipe is high, andthe risk of liquid leakage is effectively lowered; besides, when the communicating pipe is communicated with the breakover pipe, the breakover pipe is driven to perform breakover so that to-be-detected liquid in the tank can flow to the communicating pipe through the breakover pipe and finally flow into the liquid level pipe, and thus liquid level detection is facilitated.

The invention discloses a cutting device suitable for plates with different thicknesses, which comprises a steel plate conveying device, a working platform, a shearing knife and a vertical hydraulic cylinder driving the shearing knife to move in the vertical direction. The steel plate conveying device includes horizontally distributed A plurality of lower feeding rollers and a plurality of upper feeding rollers arranged above the lower feeding rollers, with the conveying direction of the material as the front, the distance between the upper feeding rollers and the lower feeding rollers gradually decreases along the direction from the back to the front, the working platform It is flush with the plane where the upper edges of the plurality of lower feeding rollers are located, and the working platform is located in front of the lower feeding rollers, the shearing knife is arranged above the rear edge of the working platform, and the shearing knife is fixedly installed on the vertical hydraulic pressure The end of the piston rod of the cylinder. The beneficial effect of the invention is that the efficiency is improved, labor is saved, and the smooth introduction and delivery of plates with different thicknesses can be realized.

The present invention relates to a slide bearing (1) in which half members (2, 2) obtained by bisecting a cylinder in parallel to the axial direction are arranged vertically, wherein: in an axial-direction end section of the lower half member (2), a narrow groove (3) is provided along the circumferential direction on the downstream side in the rotating direction; a circumferential edge section (2a) formed so as to be lower than the surface that abuts against a crankshaft (11) is provided on the outer side of the narrow groove 3 in the axial direction; and in a cross-sectional view orthogonal to the length direction of the narrow groove (3), the bottom surface (3a) of the narrow groove (3) is formed in a curved manner. Thus, the present invention can achieve a friction-reducing effect and also suppress the total amount of effluent oil.

A software introduction system 100, equipped with a processor and memory, is used for introducing software having a prescribed configuration into an information processing device, wherein the softwareintroduction system 100 is provided with: an introduction allowability information storage unit 1041 for storing information regarding the software the introduction of which into the information processing device has failed and the cause of the failure; and a software introduction unit 408 which, when introduction of the software that was designed has failed, determines whether or not it is possible to introduce the designed software on the basis of the stored cause of failure and which, when it is determined that introduction is possible, executes a prescribed process that is associated withthe cause and thereby introduces the designated software into the information processing device.

The invention discloses a preparation method and application of a nano-emulsion bacteriostatic agent with mango peel as a material, and belongs to the technical field of botanical pesticide preparations, the method comprises the following steps: drying and crushing the mango peel, and extracting with a first polar solvent to obtain a first crude extract; dissolving with a second polar solvent, adjusting the pH value to an isoelectric point, and carrying out ultrasonic-assisted extraction and standing layering to obtain an upper organic phase; removing a solvent to obtain a refined extract, and mixing the refined extract with an emulsifier and water to form a pre-emulsion; and carrying out high-speed shearing and high-pressure homogenization treatment to obtain the nano-emulsion bacteriostatic agent. The invention further provides application of the prepared nano emulsion bacteriostatic agent, the technical problems that an existing plant source bacteriostatic agent is low in active ingredient extraction efficiency, easy to degrade, poor in stability, not prone to uniform dispersion and the like are solved, efficient enrichment and stable encapsulation of the active ingredients are achieved through the integrated extraction, refining and nano emulsification technology, and the bacteriostatic agent has the advantages of being environmentally friendly, free of toxic and side effects and the like. Therefore, the antibacterial effect and the storage stability of the final product are remarkably improved.

The invention relates to a passive advanced pressurized water reactor coolant pump installation technology. The passive advanced pressurized water reactor coolant pump installation technology is characterized in that a main pump occasional passage is provided; before a main pump is introduced to a nuclear island workshop, butt joint between a flat car transporting the main pump and the main pump occasional passage is completed; a draw gear is used to introduce a main pump / transport towing bracket assembly embarked on a mobile device to the nuclear island workshop; during the drawing process, a tail slipping device is used to prevent the moving speed becoming too fast, and then the main pump is moved to a turnover initial position; a ring crane hook is lifted and coordinates with moving of the mobile device so as to turnover the main pump, and at the same time, a tow rope of the tail slipping device is adjusted; the main pump is lifted to a steam generator cavity, and is located in a main pump installation mechanical device; a suction adapter in a pump housing completes the installation work before installation of the main pump; the main pump installation mechanical device is utilized to provide moving, positioning, adjusting and lifting of the main pump; and a sealing ring at the upper part of the main pump and the pump housing directly utilize the welded sealing technology to realize prevention of leakage during the operating process.