37results about How to "Play a cohesive role" patented technology

The invention discloses an intelligent medicine purchase system based on regional medical cooperation and doctor advice compliance monitoring. The intelligent medicine purchase system comprises a server for interacting data with a medical information platform of a basic medical unit, a medical information platform of a large-size medical unit, a regional medical information platform and a service information platform of a medicine selling website, wherein the server comprises a medical unit service subsystem, a patient service subsystem and a medicine purchase guide service subsystem. The regional medical cooperation is combined with medicine purchase guide for a patient; cooperation for medicine purchase and outpatient service is supplied to the patient according to information in doctor advice, so that the time of the patient can be saved, and the treatment efficiency and the treatment quality of a doctor can be improved; and the doctor advice compliance of the patient can be indirectly promoted.

The invention relates to a self-timer lever comprising a mobile phone shell body, a telescopic rod, a connector and a rotating part. A groove used for connecting with and accommodating a rod piece is arranged in the back of the mobile phone shell body, the rod piece is a connecting body for the connector, the rotating part and the telescopic rod, the cross section of the groove is semicircular, and clamping bars are arranged on two sides of an upper opening along the circumferential extending direction. The telescopic rod is connected with the mobile phone shell body through the rotating part and the connector, the connector is connected with the mobile phone shell body by hinging to one end of the groove, and the rotating part and the connector as well as the telescopic rod and the rotating part are connected fixedly. The self-timer lever is perfectly combined with a mobile phone shell, and is convenient to carry, capable of communicating or shooting anytime, novel, attractive, convenient and practical.

A slight-smelting TIG torch-brazing method for thick red copper plate without preheating includes such steps as using electric arc to heating the bottom of groove while filling the welding wire until the height of the filled seam is 1 / 3 of thickness of red copper plate, heating to resmelt the filled metal while blowing the molten metal up to the top of groove for slightly smelting it, and fastly feeding the welding wire to both slopes of groove while TIG arc welding.

The invention relates to a multifunctional selfie stick comprising a mobile phone case body, a connector A, a connector B and a telescopic stick. The side of the mobile phone case body is provided with a groove for connecting and accommodating a stick piece, namely, a connecting body composed of the connector A, the connector B and the telescopic stick. The cross section of the groove is semi-circular, and the two sides of an upper opening of the groove are respectively provided with a clamping strip in the direction extending along the circumference. The telescopic stick is connected with the mobile phone case body through the connector A and the connector B. The connector A and the mobile phone case body are in hinged connection at one end of the groove, and the connector B and the connector A are in hinged connection. The telescopic stick and the connector B are in fixed connection. According to the invention, the selfie stick and the mobile phone case are combined perfectly. The multifunctional selfie stick is convenient to carry. Calling or shooting can be performed at any time. The multifunctional selfie stick is novel, attractive, convenient and practical.

The invention discloses a small feeding device of an agricultural machine. The feeding device comprises a rack, a feeding groove mechanism, a material supplementing groove mechanism, a power device, a first height adjusting device, a second height adjusting device, a first angle adjusting device, a second angle adjusting device, a moving device and a positioning device. The vertical first height adjusting device and the vertical second height adjusting device are arranged in the middle portion of the rack, and the first height adjusting device is arranged at the front end of the second height adjusting device; the tail end of the feeding groove mechanism is arranged in the first height adjusting device, and the front end of the material supplementing groove mechanism is arranged in the second height adjusting device; the feeding groove mechanism is connected with the first angle adjusting device, and the material supplementing groove mechanism is connected with the second angle adjusting device; the first angle adjusting device and the second angle adjusting device are connected with the power device; the first height adjusting device and the second height adjusting device are connected with the power device; and the moving device and the positioning device are further arranged at the bottom end of the rack. The feeding device is used for material conveying, the height and the inclined angle are adjustable, and generality is high.

The invention relates to a special fertilizer for the desert and desertification control and the preparation method. The special fertilizer comprises the following materials in weight percentage: humic acidic ammonium of 80 percent to 95 percent; monoammonium phosphate, diammonium phosphate or double superphosphate of 3 percent to 10 percent, potassium sulfate or potassium chlorate of 2 percent to 10 percent; or the special fertilizer comprises the following materials in weight percentage: humic acid ammonium of 80 percent to 97 percent and monopotassium phosphate of 3 percent to 20 percent. The preparation method of the special fertilizer comprises: the humic acid ammonium is prepared; the humic acid ammonium of 80 percent to 95 percent, the monoammonium phosphate, diammonium phosphate or double superphosphate of 3 percent to 10 percent and the potassium sulfate or potassium chlorate of 2 percent to 10 percent are mixed fully and uniformly; or the humic acid ammonium of 80 percent to 97 percent and the monopotassium phosphate of 3 percent to 20 percent are mixed fully and uniformly; the admixture is grinded into 70 to 90 mesh. The invention has the advantages that the special fertilizer of the invention can improve the soil physicochemical properties and has a coacervation on sand, simultaneously the special fertilizer can stimulate the growth of the root of the green crop for sand control and strengthen the sand stabilization and drought-resistant capacity.

The embodiment of the invention provides a display panel, a preparation method thereof, and a display device, and relates to the technical field of display. A resin adhesive layer can be prevented from being stripped from a substrate when the display panel is bent. The display panel comprises a substrate, and an OLED device and an encapsulation layer which are successively disposed on the substrate, wherein the encapsulation layer at least comprises a resin adhesive layer disposed on a side of the OLED device. The display panel further comprises at least one a first fixing member, wherein thefirst fixing member includes a fixing portion, and the fixing portion includes a first portion and a second portion. The substrate includes a first groove at a side close to the OLED device. The firstportion is embedded in the first groove, and the second portion is completely embedded in the resin adhesive layer.

The invention discloses an omni-directional fixing device for laser welding, and relates to the technical field of laser welding. The fixing device includes a base, a lower bottom plate and a main gear; the lower bottom plate and the base are welded; the main gear is arranged in the base, the surface of the bottom end of the base is connected with a separation layer, the lower bottom plate is welded outside the base, a through hole is formed in the inner surface of the lower bottom plate, and the main gear is arranged in the base. According to the omni-directional fixing device for laser welding, a sliding block and a spring are arranged, so that the sliding block can stretch and slide through the spring, so that the materials can be fixed; meanwhile, the materials with different sizes canbe fixed through the sliding of the sliding block, the materials can be fixed in an omni-directional mode by the distribution of the sliding blocks, and the fixing effect of the device on the materials is improved, meanwhile, the stability of the materials is improved, so that large errors in welding caused by the movement of the materials in the welding process are avoided.

The invention discloses a turf sodding device achieving continuous sodding. The device comprises a vehicle body, an intermittent feeding mechanism, an unfolding mechanism and a sodding structure; the intermittent feeding mechanism, the unfolding mechanism and the sodding structure are all located in the vehicle body, and the intermittent feeding mechanism comprises an inclined plate, a crank set, a meshed gear set, an A-type belt pulley I and an A-type belt I; the unfolding mechanism comprises an A-type belt pulley II, an A-type belt II, a conveyor belt, a hollow roller, an A-type belt pulley III and an A-type belt III; the sodding structure comprises a support shaft connected with a soft plate, at least two connecting rods are connected between the support shaft and the soft plate, a telescopic rod adjusting the height of the soft plate is vertically connected to the portion above the connecting rods, the sodding structure further comprises a conveying belt with the conveying direction same as that of the conveyor belt, the conveying belt is connected with the conveyor belt through the soft plate, and a discharge plate used for laying turf outwards is arranged at the tail of the vehicle body. Accordingly, the problem that an existing turf sodding machine is poor in sodding efficiency is solved.

The invention discloses a floor drain connecting device and a construction method thereof, and belongs to the technical field of floor drain construction. The floor drain connecting device comprises awater stopping node which is fixed to a template and is poured together with the template and a floor slab reinforced concrete frame; the water stopping node penetrates a floor slab; the upper side of the water stopping node communicates with a drainage pipe; and the upper side of the drainage pipe is connected to a floor drain amin body. The construction method comprises the following construction steps: (1) conducting locating; (2) burying the water stopping node; (3) mounting the drainage pipe; (4) conducting waterproofing treatment; (5) paving a ground; (6) mounting a floor drain; (7) mounting a water-falling pipe; and (8) implementing a test. The floor drain connecting device and the construction method provided by the invention can reduce construction cost, shorten a construction period, reduce human input in inspection and acceptance, and reduce appearance quality and control difficulty of a using effect.

The invention discloses an organic composite fertilizer and a preparation method thereof. The organic composite fertilize comprises 80 to 90% of ammonium humate, 10 to 15% of xylose powder and 1 to 3% of concentrated superphosphate, wherein the ammonium humate is a mixture obtained by fully mixing raw materials consisting of 65 to 75% of brown coal powder, 8 to 12% of urea, 15 to 25% of ammonium bicarbonate and 1 to 15% of clear water. The ecological organic composite fertilizer can improve physical and chemical properties of soil and survival capability of ecological vegetation crops; and the preparation method is simple, is convenient for popularization and popularization and has low production cost and good economic benefits.

The invention discloses an auto-control instrument bracket convenient to demount and mount. The auto-control instrument bracket comprises a mounting box shell, a storing groove is formed in the innersurface of the mounting box shell, a connecting column is fixedly mounted on the outer surface of the upper end of the mounting box shell, and a limiting pin is arranged on the position, close to thefront end, of the outer surface of the connecting column in an embedded mode; and a telescopic rod is arranged on the position, close to the upper end, of the inner surface of the connecting column, and a plurality of limiting holes are formed in the outer surface of the telescopic rod. To sum up, the auto-control instrument bracket convenient to demount and mount has the beneficial effects that the auto-control instrument bracket convenient to demount and mount is provided with the telescopic rod, a connecting block and a connecting shaft, the elongation of the instrument bracket can be adjusted, thus the different mounting height can be adapted, the mounting box shell can be kept vertical when the auto-control instrument bracket is mounted on the different mounting faces, thus the instrument bracket can adapt to the different mounting faces, the instrument bracket can be conveniently demounted and mounted, the time and labor are saved, and the auto-control instrument bracket is simple in structure and convenient to use.

The invention discloses a stainless steel composite plate of a vacuum container and a preparation method thereof. The stainless steel composite plate comprises a carbon steel plate and a stainless steel plate, wherein the carbon steel plate is positioned on the outer side of the vacuum container; the stainless steel plate is positioned on the inner side of the vacuum container. Compared with the prior art, the scheme has the advantages that a mode of welding and combining carbon steel and the stainless steel plate is adopted, the stainless steel plate can be processed flatly and is suitable for being positioned on the inner side of the vacuum container, the carbon steel plate (the cost is lower than that of the stainless steel plate) is used for enhancing the strength of the whole composite plate, and the carbon steel plate is difficult to deform and is positioned on the outer side of the vacuum container. The stainless steel plate and the carbon steel plate are compounded, so that theproduction cost is reduced.

The invention discloses an optical fiber coupler used for a high-voltage equipment control device. The optical fiber coupler comprises optical fiber plugs and an external terminal, wherein the external terminal is composed of an external terminal base body and N optical fiber plug channels which are positioned in the external terminal base body, and N is greater than or equal to 1; the optical fiber plug channels are used for fixing the optical fiber plugs passing through the optical fiber plug channels; a board clamping terminal is composed of a board clamping terminal base body and N light-emitting tube sleeves arranged inside the board clamping terminal base body; a light-emitting tube packaging hole used for packaging a light-emitting tube is formed inside each light-emitting tube sleeve; when the optical fiber plugs pass through the optical fiber plug channels and the front parts of the optical fiber plugs are completely inserted in the light-emitting tube sleeves, gaps are formed between the optical fiber plugs and the light-emitting tubes; the optical fiber plug channels are in one-to-one correspondence with the light-emitting tube sleeves; and axes of one optical fiber plug channel and the corresponding light-emitting tube sleeve are aligned with each other. The invention further discloses the optical fiber plug. The optical fiber coupler has the advantages of high arrangement density, good anti-interference performance, high maintainability and the like.

The invention discloses a high-precision plate washing head, and relates to the technical field of plate washing heads. The head specifically comprises a supporting mechanism, connecting devices and aplate washing needle assembly, wherein the connecting devices are mounted on the front side and the rear side of the supporting mechanism, the interior of the supporting mechanism is vertically provided with the plate washing needle assembly in a penetration mode, the plate washing needle assembly comprises a first gas injection cylinder, a second gas injection cylinder, a third gas injection cylinder, a communicating pipe, a liquid injection pipe, a gas receiving pipe, a rubber folding cylinder, a taper sleeve, bristles and a needle pipe, the first gas injection cylinder, the second gas injection cylinder, and the third gas injection cylinder are sequentially connected in the vertical direction, the liquid injection pipe is welded to the top end of the first gas injection cylinder, the rubber folding cylinder is bonded to the bottom end of the third gas injection cylinder, and the bottom end of the liquid injection pipe communicates with the needle pipe. According to the high-precision plate washing head, stretching-out and drawing-back of all plate washing needles can be independently controlled through a gas pressure principle, and the stretching-out and drawing-back amount ofeach plate washing needle is completely dependent on the amount of gas exhausted or injected, so that the precision is high.

The invention provides a high-strength building steel node structure, which belongs to the field of building structures. It solves the problem of low structural strength of existing steel nodes. This high-strength building steel node structure includes I-shaped steel beams. The steel beams include two wing plates and a web plate. It also includes supporting right-angle steels and two clamping right-angle steels. The supporting right-angle steels include two supporting steel plates. The right-angle steel includes two clamping steel plates, and also includes a fixed steel plate fixed on the wall. One end of the steel beam is supported on the fixed steel plate, and each of the two clamping right-angle steels has a clamping steel plate clamped on both sides of the web. The other clamping steel plate on the two clamping right-angle steels is fixed on the fixed steel plate through fasteners, and the supporting steel plate on the supporting right-angle The firmware is fixed with the wing plate, and the other supporting steel plate is fixed on the fixed steel plate through the fastener. The steel node structure is easy to install and has higher strength than the traditional welding fixing method.

The invention provides a buckwheat plant essential oil extraction process. Operation is completed through cooperation of a tripod, a distillation flask, a penetrating hole, a leading-out pipe, a three-way frame set, a chopping device, a fixing frame, a storage frame and a valve connecting pipe. According to the invention, problems that when chopped buckwheat leaves are put into the distillation flask, due to the facts that the pipe opening of the distillation flask is small, the chopped buckwheat leaves are fine, and part of the buckwheat leaves are likely to scatter when the buckwheat leavesare placed, people can cut the buckwheat leaves into large pieces according to the situation so that the buckwheat leaves can be conveniently placed into the distillation flask, but the distillation effect is often delayed due to the large buckwheat leaves, and the like are solved.

The invention discloses a non-preheating tungsten argon arc welding micro-melt brazing method for thick-walled red copper, which relates to the improvement of the thick-walled red copper plate welding method. The first stage of the present invention adopts argon tungsten arc welding and arc brazing to fill the weld seam, heats the bottom of the groove of the parent metal with an electric arc, fills the welding wire without swinging, and the height of the filled weld seam is 1 / 3 of the thickness of the copper plate ; In the second stage, heating and remelting the filler metal in the first stage without filling the welding wire, and using an electric arc to stir up the molten metal liquid along the side of the groove until it reaches the top of the groove, and stay for 0.5-1s. After the slight melting occurs here, the arc moves downward again, so that this side forms a micro-melt layer mixed with the solder and the base metal, and uses the same method to make the corresponding groove on the other side form a micro-melt layer, and so on. Advance forward; the third stage uses double-point wire feeding to quickly fill the welding wire to form a micro-melting brazing seam. The invention has the advantages of no need for preheating for welding thick plate red copper, simple welding operation, beautiful welding seam shape and high welding quality.

The invention discloses a method for treating wastewater containing an impregnating agent, and belongs to the technical field of sewage treatment. The method comprises the following steps that the wastewater containing the impregnating agent is fed into an insulating reaction kettle; direct current is used for electrifying the wastewater containing the impregnating agent; NaOH is added into the reaction kettle, and uniform stirring is carried out, so that the pH value is kept between 8.8 and 9.0; a flocculating agent is added; NaCl is added; the reaction kettle is heated and pressurized at 70-90 DEG C and at 1.8-3.6 MPa, a reaction is carried out for 1-2.5 hours, electrifying is stopped, and solid-liquid separation is carried out. The method for treating the wastewater containing the impregnating agent has the advantages that the wastewater containing the impregnating agent is treated through demulsification, addition of the flocculating agent and electrocoagulation, the oil stain treatment rate reaches 99.5%, the COD removal rate reaches 98.3%, the SS removal rate reaches 98.5%, the treated wastewater can be directly recycled, most of sludge is grease components, and the grease components after vacuum suction filtration can serve as a dye.

The invention discloses an all-round fixing device for laser welding, which relates to the technical field of laser welding, specifically a base, a lower base plate and a main gear. The lower base plate and the base are welded, and the main gear is arranged inside the base. The bottom surface of the base is connected with a partition, and the base is welded with a lower bottom plate, and the inner surface of the lower bottom plate is provided with a through hole, and the main gear is arranged inside the base. The all-round fixing device for laser welding, through the setting of the slider and the spring, the slider can be stretched and slid through the spring, which is convenient for fixing materials, and at the same time, materials of different sizes can be fixed by sliding the slider , and the distribution of the slider is set, so that the material can be fixed in all directions, which improves the fixing effect of the device on the material, and also improves the stability of the material, avoiding the movement of the material during the welding process and causing the welding to occur. large error.

The invention discloses a permanent magnet servo system for cleaning dust particles and reducing vibration frequency. Its structure includes a drill bit, a machine body, a machine board, a control ring, and a machine cover. Installed on the fuselage, the fuselage is installed and connected with the machine cover, the control ring is composed of square buckles, buttons and ring belts, the square buckles and buttons are embedded in the ring belt, and the machine board of the present invention is formed by expanding and operating according to the vibration frequency The triangular air cushion body further strengthens the stability of the motor body, and the control ring strengthens the fixing of the machine cover, which improves the stability of the machine cover and the overall stability of the motor. The vibration frequency is greatly reduced. When there are wear particles, the particles will It enters the drill pipe and falls into the slitting ring in an orderly manner under the transmission of the bottom circle structure. The wear particles generated are effectively cleaned, and the drill pipe and the fuselage will not be rubbed by dust particles. The operation of the equipment is more stable and efficient. The data is precise.

The invention discloses a rapid pipe arranging machine for large-diameter super-long hoses. The rapid pipe arranging machine comprises a pipe conveying line, a pipe arranging groove, an automatic pipe arranging system, a manipulator, an automatic induction electric eye, a push rod, a sucker, a servo motor and a control system. The pipe conveying line is mounted at the top of the pipe arranging groove, and the automatic pipe arranging system is mounted in the pipe arranging groove; the manipulator is located at the discharging end of the pipe conveying line; the servo motor is located on the side, away from the pipe conveying line, of the manipulator, and a suction cup is fixedly installed on an output shaft of the servo motor; a push rod is arranged on one side of the sucker on the second rack, and a next process assembly line is arranged on the other side of the sucker; automatic induction electric eyes are arranged on two sides, away from the suction cups, of the second rack. According to the invention, an intermediate turnover link is reduced, and the previous procedure is directly connected with the next procedure, so that a connection effect is achieved; and meanwhile, the problem of waste labor of enterprises at present is solved, butt joint of a high-speed printing assembly line is achieved, the productivity is improved, and considerable economic benefits are achieved.

The invention discloses an automobile part polishing machine. The automobile part polishing machine comprises a fixing support, an upper cover and a gear, wherein an air pressure rod is installed on the surface of the inner wall of the fixing support, a supporting frame is fixed outside the air pressure rod, and a soft cushion is connected to the surface of the inner wall of the supporting frame;a bolt is installed above the interior of the supporting frame, a connecting rod is arranged on the right side of the air pressure rod, a polishing disc is installed outside the right end of the connecting rod, and a ball is arranged inside the polishing disc; and a tooth block is fixed on the outer surface of the polishing disc, and a spring is arranged inside the upper cover, the upper cover islocated above the right side of the polishing disc, and the top end of the spring is connected with a clamping block. Compared with an existing common automobile part polishing machine, the automobilepart polishing machine can polish a front face and a back face of a workpiece at the same time, so that the polishing time of the polishing machine is shortened, the working efficiency of the polishing machine is improved, waste materials generated in a polishing working process of the polishing machine can be collected, and waste of the raw materials is avoided.

The invention discloses an ecological organic composite fertilizer and its preparation method. The fertilizer is composed of 85-93% of ammonium humate, 5-10% of powdered straw sugar and 2-5% of triple superphosphate. The ammonium humate is composed of the following raw materials: by weight, 50-70% of brown coal powder, 5-10% of urea, 10-20% of ammonium bicarbonate, 5-20% of clear water, and a fully-mixed mixture. The ecological organic composite fertilizer can be adopted to improve physical and chemical properties of soil and viability of ecological vegetation crops. The preparation method is simple, is convenient for popularization, requires low production cost, and has good economic benefits.

The invention discloses a riverway eutrophication sewage recycling treatment device comprising a settling chamber, a blowdown device, a connecting pipe, a conversion chamber and a driving control system; a water inlet pipe is arranged at the upper part of the left side of a settling chamber body; bottom inclined planes are arranged at the two ends of the lower part of the settling chamber body; when in use, an operating rod is pressed down to drive a conical body to move upwards, and the conical body falls into a channel and is limited by a channel positioning bulge after the operating rod isloosened; the connecting pipe introduces water into the conversion chamber from the settling chamber body; a stirring rotating shaft is inserted into a conversion chamber tank body, rotating blades are arranged on the stirring rotating shaft, an air dispersing ring is an annular metal component which is hollow inside and provided with air dispersing holes in the side wall, a pipeline arranged on the side portion of the air dispersing ring is connected with an air pump, sludge containing aerobic bacteria is placed in an inner cavity in the bottom of the conversion chamber tank body, and algae crops are planted on the sludge. By arranging the conversion chamber, eutrophic substances in sewage can be effectively eliminated, and the riverway eutrophication sewage recycling treatment device isreasonable in structure and convenient to use and is suitable for wide application in sewage treatment.

The invention provides a buckwheat plant essential oil extraction process. Operation is completed through cooperation of a tripod, a distillation flask, a penetrating hole, a leading-out pipe, a three-way frame set, a chopping device, a fixing frame, a storage frame and a valve connecting pipe. According to the invention, problems that when chopped buckwheat leaves are put into the distillation flask, due to the facts that the pipe opening of the distillation flask is small, the chopped buckwheat leaves are fine, and part of the buckwheat leaves are likely to scatter when the buckwheat leavesare placed, people can cut the buckwheat leaves into large pieces according to the situation so that the buckwheat leaves can be conveniently placed into the distillation flask, but the distillation effect is often delayed due to the large buckwheat leaves, and the like are solved.

The invention relates to a special fertilizer for the desert and desertification control and the preparation method. The special fertilizer comprises the following materials in weight percentage: humic acidic ammonium of 80 percent to 95 percent; monoammonium phosphate, diammonium phosphate or double superphosphate of 3 percent to 10 percent, potassium sulfate or potassium chlorate of 2 percent to 10 percent; or the special fertilizer comprises the following materials in weight percentage: humic acid ammonium of 80 percent to 97 percent and monopotassium phosphate of 3 percent to 20 percent. The preparation method of the special fertilizer comprises: the humic acid ammonium is prepared; the humic acid ammonium of 80 percent to 95 percent, the monoammonium phosphate, diammonium phosphate or double superphosphate of 3 percent to 10 percent and the potassium sulfate or potassium chlorate of 2 percent to 10 percent are mixed fully and uniformly; or the humic acid ammonium of 80 percent to97 percent and the monopotassium phosphate of 3 percent to 20 percent are mixed fully and uniformly; the admixture is grinded into 70 to 90 mesh. The invention has the advantages that the special fertilizer of the invention can improve the soil physicochemical properties and has a coacervation on sand, simultaneously the special fertilizer can stimulate the growth of the root of the green crop for sand control and strengthen the sand stabilization and drought-resistant capacity.

The invention discloses a high-precision plate washer, relates to the technical field of the plate washer, and specifically includes a support mechanism, a connecting device and a plate washer needle assembly. The front and rear sides of the support mechanism are equipped with connecting devices. The plate washing needle assembly vertically runs through the inside of the support mechanism, and the plate washing needle assembly includes a first gas injection cylinder, a second gas injection cylinder, a third gas injection cylinder, a communication pipe, a liquid injection pipe, an air connection pipe, a rubber folding cylinder, a cone cover, bristles and needle tube, the first gas injection cylinder, the second gas injection cylinder and the third gas injection cylinder are connected in sequence along the vertical direction, the top of the first gas injection cylinder is welded with a liquid injection pipe, and the third gas injection cylinder The bottom end of the injection tube is bonded with a rubber folding tube, and the bottom end of the liquid injection tube is connected with a needle tube. The high-precision washing head can independently control the expansion and contraction of each washing needle through the principle of air pressure, and the amount of expansion and contraction of each washing needle depends entirely on the amount of air drawn out or filled in, so the precision is relatively high. high.