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393 results about "Mechanical force" patented technology

A mechanical force involves contact with another object. Mechanical forces are distinguished from the four natural forces of electromagnetism, the strong nuclear force, the weak nuclear force and gravity. While each of the four natural forces do not require a physical connection, mechanical forces must travel through a medium.

Systems for cleaning and / or cooling additively manufactured objects and associated methods

Systems and methods for processing additively manufactured objects are provided. In some embodiments, a method includes receiving one or more additively manufactured objects that are at least partially covered with a precursor material, cooling the one or more additively manufactured objects and the precursor material to a target temperature, and removing at least some of the precursor material from the one or more additively manufactured objects via application of mechanical force.
Owner:ALIGN TECHNOLOGY INC

Tunnel boring device and tunnel boring machine

PCT designated stage expiredWO2025086615A1TunnelsClassical mechanicsTunnel boring machine
A tunnel boring device and a tunnel boring machine, which aim to solve the problem of a hinged oil cylinder being likely to be damaged due to a propulsion mode. The tunnel boring device (100) comprises a front shield (110), a middle shield (120), and a tail shield (130). A first propulsion assembly (140), a second propulsion assembly (150) and an auxiliary propulsion member (160) are provided inside the tunnel boring device; the auxiliary propulsion member (160) is located between the front shield (110) and the second propulsion assembly (150); and when the front shield (110) is stuck, the second propulsion assembly (150) moves in a tunneling direction, such that a second end of the second propulsion assembly (150) comes into contact with and abuts against the auxiliary propulsion member (160), thereby pushing the front shield (110) to free the front shield. In the present application, a dual-mechanical force transmission structure is provided, which helps to avoid the risk whereby a hinged oil cylinder is likely to be damaged when ultrahigh thrust is transmitted to the front shield by means of a single mechanical force transmission structure, and which transmits the ultrahigh thrust to the front shield, facilitating escape of the front shield, and then guaranteeing normal boring of a tunnel boring machine.
Owner:CHINA RAILWAY CONSTR HEAVY IND

Ball for racket sports

A ball is configured for use in racket and paddle sport games. These configurations include a material composition that is sensitive to mechanical force. This composition may change colors in response to a crack or other defect in the surface of the ball. In one implementation, the ball may have a thin, peripheral wall that encloses a hollow interior. This ball may find use in pickleball and, thus, meets the requirements and parameters for use in the sport.
Owner:SILVA ARLENE

Pressure head tool for laser welding of square battery cell module

The invention discloses a head pressing tool for laser welding of a square battery cell module, and relates to the technical field of electronic manufacturing and laser machining, the head pressing tool comprises a base, an output groove is formed in the top of the base, a groove is formed in the top of the base, and a limiting groove is formed in the top of the base; a pressure head device, a clamping device and an auxiliary device are arranged at the top of the base, automatic input is achieved through the pressure head device, it can be guaranteed that the positions and the directions of all modules are consistent in the production process, personal errors are reduced, the consistency and the quality of products are improved, and in the laser welding or other machining processes, the production efficiency is improved. The module may be affected by heat, pressure or mechanical force, if the upper portion is not fixed, the module may move or vibrate, poor welding or mismatching of parts may be caused, the movement can be reduced through upper portion fixing, and the stability of the machining process is ensured.
Owner:SUQIAN CHENWEI NEW ENERGY TECHNOLOGY CO LTD

Dual Latch System for Hopper Cover of an Aerial Application Aircraft

In one embodiment, a system for an aerial application aircraft includes a hopper cover, an electric actuator coupled to the hopper cover, a latch sequencing mechanism, a spring, and a dual latch mechanism. The latch sequencing mechanism includes a latch rod coupled to the electric actuator that moves the latch rod between a latched position and an unlatched position. The spring is coupled to the latch sequencing mechanism and the latch rod, and the spring exerts linear mechanical force based on the latch rod being in the latched or unlatched position. The dual latch mechanism is coupled to the latch rod and includes a first latch pin that engages a first latch box and a second latch pin that engages a second latch box opposite the first latch box.
Owner:TEXAS TRANSLAND LLC

Electric fascia gun self-adaptive to mechanical strength

The invention discloses an electric fascia gun self-adaptive to mechanical strength, and belongs to the technical field of electric fascia guns, the electric fascia gun self-adaptive to mechanical strength comprises a main body mechanism used for relaxing fascia of a patient part or a part needing to be relaxed, and the main body mechanism is provided with a self-adjusting mechanism for adjusting huge strength according to different pressing strength. The self-adjusting mechanism comprises a fixing cylinder fixedly installed in the fascia gun shell. By means of a mechanical self-adjusting mechanism, the pressing force of the hand of a user is directly converted into the impact strength of the operation tail end in real time, when the user presses down forcibly, the displacement of the outer sliding sleeve pushes the sliding column to move outwards without delay through the inclined groove plate and the lifting conical head, the eccentric distance of a transmission system is increased, and the transmission efficiency is improved. The stroke and the impact force of the operation tail end are linearly increased, accurate force feedback can be provided according to different body parts and muscle states, the poor relaxation effect caused by insufficient force is avoided, and damage possibly caused by excessive impact in a sensitive area is also prevented.
Owner:ZHEJIANG RED & BLACK TECH CO LTD

Hand-held pulling and compression device and mechanical force amplifier

The invention relates to a hand-held pulling and compression device and a mechanical force amplifier for a hand-held pulling and compression device for driving pulling and pressing tools. The hand-held pulling and compression device for driving interchangeable tools has a drive unit comprising a battery-operated electric motor, a first screw drive with a first threaded spindle mounted rotatably on a housing body and a threaded nut mounted rotatably on the first threaded spindle and non-rotatably on the housing body via a bearing unit, and a coupling unit connectable to a tool holder for transmitting tensile and compressive forces resulting from the direction of rotation of the first threaded spindle from the first threaded nut to the tool holder. In order to provide a mechanical force amplifier for a hand-held pulling and compression device and a hand-held pulling and compression device which can be easily and flexibly adapted to different work operations, it is provided that the mechanical force amplifier has a connecting section for detachably fixing the mechanical force amplifier to a connection section of the housing body of the hand-held pulling and compression device and a tool connection for pulling and compression tools.
Owner:TKR SPEZIALWERKZEUGE GMBH

Detection device for plastic packaging bag production

The invention discloses a detection device for plastic packaging bag production, and belongs to the field of plastic packaging bag production, and the detection device comprises a first threaded cylinder, the interior of the first threaded cylinder is rotatably connected with a threaded rod in a threaded manner, the two sides of the first threaded cylinder are fixedly connected with first baffles, and the end, away from a rotating handle, of the threaded rod is rotatably connected with a second threaded cylinder. The bottom end of the second threaded cylinder is fixedly connected with a circular bottom support, the end, away from the second threaded cylinder, of the telescopic rod is fixedly connected with the circular bottom support, the bottom end of the circular bottom support is fixedly connected with a first tension sensor, the lower side of the first tension sensor is fixedly connected with a fixing plate, and the fixing plate is slidably connected with the first tooth-shaped clamping plate. And a lower clamping assembly is assembled at the bottom end of the inner wall of the box body. According to the plastic packaging bag tensile strength testing device, the tooth-shaped clamping plates are arranged to clamp a plastic packaging bag, and meanwhile, the tooth-shaped clamping plates are matched with the hydraulic assembly, so that the effects of clamping the plastic packaging bag and testing the tensile strength of the plastic packaging bag by using mechanical force instead of manpower are achieved.
Owner:YINGKOU PAT TECHNOLOGY CO LTD

Actuators with Variable Widths

A MEMS scanning device includes a frame, a movable MEMS mirror, at least one connector, and an elongated actuator. The movable MEMS mirror is configured to be rotated about at least one rotational axis. The at least one connector is connected to the movable MEMS mirror and is configured to facilitate rotation of the movable MEMS mirror about the at least one rotational axis. The elongated actuator is configured to apply mechanical force on the at least one connector, the elongated actuator having a base end connected to the frame and a distal end connected to the at least one connector, wherein a width of the base end of the actuator is wider than the distal end of the actuator.
Owner:INNOVIZ TECH LTD

Dual Latch System for Hopper Cover of an Aerial Application Aircraft

In one embodiment, a system for an aerial application aircraft includes a hopper cover, an electric actuator coupled to the hopper cover, a latch sequencing mechanism, a spring, and a dual latch mechanism. The latch sequencing mechanism includes a latch rod coupled to the electric actuator that moves the latch rod between a latched position and an unlatched position. The spring is coupled to the latch sequencing mechanism and the latch rod, and the spring exerts linear mechanical force based on the latch rod being in the latched or unlatched position. The dual latch mechanism is coupled to the latch rod and includes a first latch pin that engages a first latch box and a second latch pin that engages a second latch box opposite the first latch box.
Owner:TEXAS TRANSLAND LLC

Dual latch system for hopper cover of an aerial application aircraft

In one embodiment, a system for an aerial application aircraft includes a hopper cover, an electric actuator coupled to the hopper cover, a latch sequencing mechanism, a spring, and a dual latch mechanism. The latch sequencing mechanism includes a latch rod coupled to the electric actuator that moves the latch rod between a latched position and an unlatched position. The spring is coupled to the latch sequencing mechanism and the latch rod, and the spring exerts linear mechanical force based on the latch rod being in the latched or unlatched position. The dual latch mechanism is coupled to the latch rod and includes a first latch pin that engages a first latch box and a second latch pin that engages a second latch box opposite the first latch box.
Owner:TEXAS TRANSLAND LLC

Production mold of motor shell

The utility model provides a production mould for a motor casing, which relates to the technical field of motor components and comprises a demoulding mechanism, a fixing mechanism is arranged at the bottom of the demoulding mechanism, the demoulding mechanism comprises a mould body, a casting cavity is arranged on the inner wall of the mould body, and a bottom ring is arranged at the bottom end of the inner wall of the casting cavity. By rotating the lead screw, external force can be continuously applied to the movable arm, the movable arm gradually evolves from an inclined mode to a transverse parallel mode, in the evolvement process, the connecting arm moves, the triangular plate moves under the pressure of the connecting arm, and the bottom ring vertically moves upwards under the condition of the external force. When the motor shell is molded, a part of the molded motor shell is ejected out of the mold cavity, so that a product can be taken out of the mold body more easily under the action of mechanical force, the production efficiency and the yield are improved, and the operation method can ensure that the product is not damaged in the demolding process.
Owner:NINGBO QIXING MOTOR CO LTD

Oil production wellhead hanger

ActiveCN222596033Uavoid discontinuationavoid duplication of workRubber ringOil production
The utility model relates to an oil production wellhead hanger, and belongs to the technical field of wellhead devices. The oil production wellhead hanger comprises a flange plate used for being connected with a flange on a casing four-way body and a hanging short section connected to a center channel of the flange plate in a threaded mode. The lower end of the hanging short section is provided with a pipe column connecting end used for being connected with a pipe column, and an overflowing channel penetrating through the upper end and the lower end of the hanging short section is arranged in the hanging short section. According to the oil production wellhead hanger, the situation that an O-shaped rubber ring of a conventional hollow conical built-in hanger is punctured and damaged by mechanical force or is aged and damaged due to long-time soaking in high-temperature, high-pressure, high-acid and / or high-salt fluid, and production halt is caused can be avoided.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

Electromagnetically Actuated Pressure Relief Valve for Fracturing Systems

Valves for relieving pressure from high-pressure fluid systems have a valve fitting and a valve actuator. The pressure relief valve is normally shut and is adapted to open at a relief fluid pressure. It comprises a valve fitting and an actuator. The actuator has a valve stem, a spring, and an electromagnet. The stem is coupled to a valve body and mounted for linear reciprocation. The spring applies a mechanical force that biases the stem to place the valve in a normally shut state, but allows the valve to open at a first fluid pressure below the relief pressure. The electromagnet applies a magnetic force that, together with the mechanical force, holds the valve in an operationally shut state at a second fluid pressure above the relief pressure. The valve may be opened at fluid pressures above the first fluid pressure by de-energizing the electromagnet at the relief pressure.
Owner:CANTEX INT INC

Device for a clamping system

PCT designated stage expiredWO2025031566A1VicesElectric drivePhysics
The invention relates to a device for retrofitting for a clamping system, in particular for a vice, wherein the device has - a connection structure for connecting the device to the clamping system, - an electric drive for providing a mechanical force, - a control stage for controlling the electric drive and - a force transmission structure for transmitting the mechanical force provided by the electric drive to the clamping system, wherein the device is designed to transmit the force provided by the electric drive to the clamping system via the force transmission structure for clamping a workpiece in the clamping system.
Owner:HS MECHATRONICS GMBH

Anti-collision hydraulic oil cylinder

The invention discloses an anti-collision hydraulic oil cylinder, and relates to the technical field of hydraulic oil cylinders, the anti-collision hydraulic oil cylinder comprises a cylinder body, and a bottom cover is fixedly mounted at the bottom end of the cylinder body. Hydraulic oil is conveyed into the cylinder body through the oil inlet A, so that the piston A is pushed to slide in the cylinder body to drive the push rod to move outwards, liquid pressure is converted into linear mechanical force, and when the piston A moves in the cylinder body, the hydraulic oil above the piston C is extruded and discharged through the oil inlet B; at the moment, the hydraulic oil can provide extrusion force for a V-shaped notch of an end cover sealing ring, so that the end cover sealing ring is tightly attached to the surface of the push rod, seepage of the hydraulic oil is prevented, the push rod continuously stretches out to drive an ejection block and a side block A to be away from a protection plate, and the protection plate can be driven to move back and forth through the tension effect of a tension spring on a side block B; and the side block B slides in the supporting rod, so that the problem that the push rod is damaged due to collision at the push rod is avoided.
Owner:MAANSHAN BRILLIANT MASCH EQUIP MFG CO LTD

Reactor multi-field coupling vibration fatigue simulation method and system based on S-N curve

The invention discloses an electric reactor multi-field coupling vibration fatigue simulation method and system based on an S-N curve, and belongs to the technical field of electric power equipment fatigue simulation, and the method comprises the steps: obtaining structure parameters and material parameters of a target electric reactor, and building a parameterized physical model comprising an iron core, a winding and an insulation assembly; based on the parameterized physical model of the target reactor, simulating a time-varying mechanical force in the target reactor under the excitation of rated power frequency current; according to the time-varying mechanical force, calculating the vibration response of each part of the target reactor, and extracting the alternating stress distribution of the target reactor under the steady-state operation condition; and based on the material S-N curve of each component of the target reactor, analyzing the alternating stress distribution by adopting a linear cumulative damage theory, and calculating the failure cycle index and the fatigue life of each component under the preset cycle load. According to the method, through multi-field coupling simulation and S-N curve analysis, the fatigue life of the electric reactor is predicted, and a basis is provided for preventive maintenance.
Owner:STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +1

Method of handling a plastic container having a moveable base

Method for processing hot-filled plastic containers are provided. In some embodiments, the method may include hot-filling a plastic container, sealing the container, and conveying the sealed container, each with an inner annular wall and a push-up portion in a first position. In some embodiments, the method may further include creating a vacuum pressure in the hot-filled and sealed container and repositioning the push-up portion from the first position to a second position under a mechanical force.
Owner:CO2 PAC

A polyethylene computer cable and its production process

The present invention relates to the field of cable technology, and provides a polyethylene computer cable, comprising: a core guide area and a protection area, a functional area is added between the core guide area and the protection area, and the protection area includes a coating layer; the core guide area includes an insulating layer, a conductor and a shielding layer; the functional area includes a heat conductive sheet attached to the outer wall of the shielding layer to absorb the heat generated during the operation of the cable, and the heat conductive sheet is installed in a winding manner; the outer side of the heat conductive sheet is provided with an arc pad and a buffer rib to buffer the external mechanical force and pressure, and prevent deformation and damage of the cable caused by external factors. The present invention can form a heat diffusion conduction mechanism inside the cable, so that the heat generated during the operation of the cable is released outward at the first time to ensure the stable operation of the cable, and at the same time form a protective structure for the cable to prevent damage caused by external factors, resist external wear and mechanical force, and keep the cable in a stable use state.
Owner:ANHUI ACME CABLE CO LTD

Handheld pulling and pressing device and mechanical power amplifier

The invention relates to a handheld pulling and pushing device and a mechanical force amplifier for a handheld pulling and pushing device for driving drawing and pressing tools. The handheld pulling and pushing device for driving interchangeable tools comprises a drive unit with a battery-powered electric motor, a first threaded drive with a first threaded spindle rotatably mounted on a housing body and a first threaded nut rotatably mounted on the first threaded spindle and rotationally fixed to the housing body via a bearing unit, and a coupling unit connectable to a tool holder for transmitting the tensile and compressive forces resulting from the direction of rotation of the first threaded spindle from the first threaded nut to the tool holder.In order to provide a mechanical force amplifier for a handheld pulling and pushing device, as well as a handheld pulling and pushing device that is easily and flexibly adaptable to different work processes, it is provided that the mechanical force amplifier has a connecting section for detachably fixing the mechanical force amplifier to a connection section of the housing body of the handheld pulling and pushing device and a tool connection for pulling and pushing tools.
Owner:TKR SPEZIALWERKZEUGE GMBH

Cutting mechanism for automobile wire harness

The invention belongs to the technical field of wire harness processing, and discloses an automobile wire harness cutting mechanism which comprises a guide piece and a clamping piece which are located at the end of a wire harness. The guide element is provided with a guide slope surface extending towards the radial outer side of the wire harness, and the guide slope surface is inserted into and acts on an interface between the braid layer and the insulating layer; an active deformation strategy of internal pressure and external expansion is adopted: a clamping and pressing piece acts on the inner side of the end part of the wire harness, and uniform pressure is applied to the center along the radial direction, so that an original circular section generates controllable local elliptical or flattened deformation. Due to basic conservation of the material volume, the inner side compression inevitably causes outward slight expansion of the outer side area, so that a continuous, annular and width-adjustable initial gap is formed at the interface of the braid layer and the insulating layer. The gap is not dependent on material relaxation, but is actively generated by mechanical force, and has high repeatability and process stability. The guide piece is smoothly wedged in through the gap, and structural damage caused by impact type insertion is avoided.
Owner:GUANGZHOU ZYE ELECTRONIC TECH CO LTD

Laser bonding and de-bonding method and system for diamond and glass

The invention discloses a laser bonding and de-bonding method and a laser bonding and de-bonding system for diamond and glass. According to the method, ultrafast laser penetrates through glass and is focused on a diamond-glass contact surface, so that the glass is locally melted and sprayed out to fill a gap, and high-strength bonding (the shearing strength reaches 14.1 MPa) is realized; during de-bonding, long-pulse laser is adopted to induce microcracks in a bonding area to form a modified surface, and lossless separation is realized through mechanical force. The method has the following advantages: (1) non-contact bonding can be realized when the gap is greater than or equal to 3 microns; (2) glass is selectively melted, and diamond damage is avoided; (3) no middle layer exists, and the intrinsic performance of the material is kept; and (4) the bonding / debonding is reversible, and the process is controllable. The matching system comprises an ultrafast laser, a long pulse laser, a precision motion platform and a computer control system, and can realize efficient connection and separation of diamond and various types of glass. The method is suitable for the high-end manufacturing fields of large-size diamond wafer preparation, optical device packaging and the like.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI

Protective gas pressure-maintaining sealing structure in heat transfer tube

The utility model provides a heat transfer tube internal protective gas pressure maintaining sealing structure, which comprises a heat transfer tube, an elastic sealing plug assembly and a one-way valve assembly, the one-way valve assembly is embedded in the elastic sealing plug assembly, and the one-way valve assembly is in sealing connection with an opening part of the heat transfer tube through the elastic sealing plug assembly. According to the utility model, the effect of keeping micro-positive pressure in the heat transfer pipe is achieved by utilizing the matching of elasticity and mechanical force of the two stages of elastic sealing plugs, the heat transfer pipe is prevented from being rusted in a common atmospheric environment, and the normal operation of nuclear power is ensured.
Owner:ZHEJIANG JIULI HI TECH METALS CO LTD

Automatic shaft pressing equipment

The invention discloses automatic shaft pressing equipment which comprises a rack, and a supporting table used for placing and fixing an actuator shell and an automatic feeding mechanism located above the supporting table and used for continuously conveying a steel shaft to a set position above the actuator shell are installed on the rack. And the pressing cylinder mechanism is used for pressing the steel shaft into the actuator shell for fixing. Automatic shaft pressing equipment is innovatively designed according to the steel shaft assembling scene of the actuator, the operation of automatically feeding small steel shafts and accurately inserting the small steel shafts into the set positions on the inner side of an actuator shell is achieved, reliable press fitting and fixing are achieved through mechanical force, a traditional tedious and time-consuming manual adjusting mode is replaced, and the production efficiency is improved. Therefore, the safety and the accuracy of operation are remarkably improved, the overall efficiency of a production line is greatly improved, the investment of human resources is reduced, and the consistency of batch quality of products can be improved.
Owner:NINGBO ZHENGQI ELECTRONICS

Pressure vessel incorporating rapid, toolless assembly and disassembly

Some variations provide a pressure vessel comprising: a chamber for processing a material under a chamber pressure up to 5000 bar; an end cap disposed at one end of the pressure chamber; an interior seal plate disposed between the end cap and the chamber volume; and a plurality of pressure-vessel keys disposed between the end cap and an outer ring. At a chamber pressure greater than atmospheric, the end cap exerts a force against the keys to automatically and reversibly actuate a pressure-vessel seal. Conversely, at atmospheric pressure or less, the keys and end cap are easily removable. Essentially, the pressure in the vessel is utilized as an in situ mechanical force to automatically actuate a safe and efficient seal. Process cycle times are significantly reduced because the vessel is not opened and closed using tooling. Throughputs are increased, improving economics of pressure vessels for extraction, reaction, or other processes.
Owner:SCO2 LLC

Permanent magnet drum type electromagnetic brake

The utility model relates to the technical field of brakes, and provides a permanent magnet drum type electromagnetic brake which comprises a machine shell, a stator, a reset element and a rotor and further comprises a permanent magnet magnetized in the radial direction, the rotor is arranged in the machine shell in a penetrating mode, the permanent magnet is fixedly arranged on the rotor in a sleeved mode, the stator is arranged on the outer side of the permanent magnet, and the reset element is connected between the stator and the machine shell. The stator is attracted by the permanent magnet to generate pressure during power loss, so that braking is formed; the magnetic force generated when the stator is electrified repels the magnetic force of the permanent magnet, the stator is pulled open by the reset element, and braking is relieved. Compared with a traditional drum-type electromagnetic brake, a mechanical force transmission structure is not needed, the structure is simplified, braking and braking releasing are achieved only through the action of a magnetic field, and the response speed is increased.
Owner:CHENGDU CHAODECHUANG TECH CO LTD

Electric braking system of a turboprop engine

The invention relates to an electric braking system (S) comprising: - a friction element (4) configured to generate a braking torque (CF) to be applied to a rotor; - an actuator (3) of the friction element (4) configured to generate a mechanical force to bring the friction element into contact with the rotor so that it applies the braking torque to the rotor; - an electromechanical member (2) configured to drive the actuator (3) of the friction element (4), the electromechanical member (2) comprising an electric motor (22) and an angular position sensor (23) configured to measure an angle of rotation of the electric motor (22); - a control unit (1) configured to control the electric motor (22) in order to achieve a target braking torque, the control unit (1) implementing a relationship between the angular position of the electric motor and the displacement of the actuator (3) to achieve the target braking torque.Figure for the abbreviation: FIGURE 2.
Owner:SAFRAN AIRCRAFT ENGINES SAS

A board lifter with high-efficiency adjusting effect

The present application relates to the technical fields of plate processing, and discloses a plate lifter with efficient adjusting effect, which comprises a disc cutter cutting mechanism, a conveying mechanism and a plate lifting mechanism, the plate lifting mechanism comprises a frame and a movable plate, the movable plate is located inside the frame, the lower side of the movable plate is provided with a frame body, and the lower side of the movable plate is provided with a cleaning assembly in the middle; the present application can adjust the positions of a plurality of V-shaped soft brushes and V-shaped scraping pieces according to the thickness of the plate, ensure that the plurality of V-shaped soft brushes and V-shaped scraping pieces contact the upper side of the plate during revolution, and facilitate the rapid cleaning of impurities on the upper side of the plate, so as to achieve efficient adjusting effect; the V-shaped soft brush opening can guide the impurities to gather in the center of the bristles, reduce the scattering of impurities during cleaning, and keep the working environment clean; and the V-shaped edge of the V-shaped scraping piece forms a line contact with the surface of the plate, and the adhered impurities are stripped by mechanical force, so that stubborn impurities are efficiently stripped.
Owner:HANGZHOU HANGCHA PRECISION MFG CO LTD