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25results about How to "Solve scrap" patented technology

Traction structure of railway vehicle

The invention relates to a railway vehicle traction structure which comprises a traction body, a transverse shock absorber seat is arranged at the bottom of the traction body, the traction body is connected with a vehicle body sleeper beam through a bolt and a special-shaped nut, the special-shaped nut is provided with a tangent plane, and a preset gap exists between the tangent plane and the surface of the vehicle body sleeper beam. After the tangent plane position of the special-shaped nut and the vehicle body sleeper beam are confirmed, the traction body and the vehicle body sleeper beam are fixed through a bolt. By designing the special-shaped nut and adopting a fastening mode of a common bolt and the special-shaped nut, the problems that mounting is difficult and the reserved mounting space for the sleeper beam of the vehicle body is large are solved; the welding structure of the traction body and the transverse shock absorber base is designed, the weight of the transverse shock absorber base is reduced, and meanwhile the problem that the overall casting quality is poor is solved. By designing the weldable transverse shock absorber seat, connection with the shock absorber is changed from blind hole bolt connection to through hole bolt and nut connection, and the problem that the whole traction body is scrapped due to connection threads is solved.
Owner:CRRC DALIAN CO LTD

Narrow gap light blocking structure

ActiveCN224593116Uavoid flashSimple structure
The utility model relates to the technical field of automobile lamps and lanterns accessories, specifically discloses a narrow gap light blocking structure, including the light blocking coating of thick wall similar one side of two adjacent car light function parts respectively and the light blocking muscle of installing between two thick walls, the light blocking muscle is installed between thick wall similar one side, and the light blocking muscle includes the light blocking plate muscle of covering sliding connection between the end of thick wall and the light blocking strip muscle of being located at one side of light blocking plate muscle and being embedded between light blocking coating, solve the problem that the traditional light blocking structure exists after installation bigger installation gap, will also rub out powder under the vibration working condition, cause the lamp quality problem and the problem of scrapping.
Owner:CHONGQING GUINUO PHOTOELECTRIC TECH CO LTD

A detachable rod end joint bearing

ActiveCN224606810UAchieve detachable separationAchieve individual replacement
The utility model belongs to joint bearing technical field, specifically speaking is a kind of detachable rod end joint bearing, including fixed subassembly, connecting component and bearing assembly;Fixed subassembly contains the fixed seat of installation slot, three threaded holes and thread groove, bolt is tightened bearing outer ring in threaded hole, and threaded rod is fixedly connected in thread groove;Connecting component contains connecting rod and one end integrally formed double-threaded threaded tube, threaded tube outer thread cooperates with thread groove, inner thread cooperates with threaded rod, and three are coaxial;Bearing assembly contains outer ring, inner ring, ball and retainer, ball is rollingly engaged between two circular arc grooves.The utility model realizes that each component can be detached, and damaged component can be replaced separately, reduces maintenance cost, improves assembly flexibility and transmission efficiency, shortens maintenance downtime, and is suitable for engineering machinery, automation equipment and other transmission scenes.
Owner:LISHUI JINZHENG BEARING MFG CO LTD

Detachable lamp bead infrared heating plate

ActiveCN224721999USolve scrapSolve the problem of returning to factory for repair
The utility model relates to the technical field of heating plate, especially infrared heating plate with detachable lamp pearl, it includes: the heat dissipation base plate and a plurality of lamp pearl module, the heat dissipation base plate inside is embedded with the power bus, and the corresponding lamp pearl module is opened with a plurality of installation stations for installing lamp pearl module, every installation station all is provided with the connecting terminal, and every connecting terminal all is electrically connected with the power bus, lamp pearl module includes module shell, infrared luminophore and connecting interface, infrared luminophore installs in module shell inside, and connecting interface sets up in module shell back and is matched with the connecting terminal in installation station, detachable locking assembly is set up in module shell and is used for with lamp pearl module detachable fixed connection in installation station, makes module shell and the installation surface in installation station tight contact simultaneously. The present application has can solve the problem of lamp pearl quick replacement and maintenance, and improve the effect of heat dissipation and heat uniformity.
Owner:国兴(东莞)新能源科技有限公司

A laser device convenient for patch packaging

The utility model discloses a kind of laser devices convenient to patch package, including support, laser chip, metal pipe cap, the support includes concave table, metallized pad and annular step part, metal heat sink is fixedly embedded in the concave table, the laser chip is fixed on the metal heat sink upper surface by eutectic solder, the metal pipe cap is the tubular structure of one end opening one end airtight, the edge of the opening end of the metal pipe cap is sealed and fixed with the annular step part, the problems such as high cost, low production efficiency, poor fault tolerance, heavy weight of traditional TO packaging equipment are solved by structural innovation, under the premise of guaranteeing the performance of laser device, production economy and process adaptability are significantly improved.
Owner:SHENZHEN ZHONGWEI RUIGUANG TECHNOLOGY CO LTD

Edge-cleaning improvement device for plate with pressing and pasting line

The utility model discloses a line pressing and pasting plate edge cleaning improving device which comprises a conveying table, two sets of gummed paper are symmetrically arranged on one side of the conveying table, shaving boards are fixedly connected to the opposite sides of the gummed paper, angle steel is fixedly connected to one side of the conveying table, two sets of angle steel are symmetrically arranged, and the two sets of angle steel are fixedly connected to the other side of the conveying table. The angle steel is arranged in an L shape, a connecting plate is arranged on one side of the angle steel, the connecting plate is arranged in an L shape, and a first spring piece is arranged on the side, away from the angle steel, of the connecting plate. The first spring piece makes contact with the side, opposite to impregnated paper, of the shaving board and the outer surface of the shaving board for primary cleaning, when the roller continues conveying, the second spring piece can conduct secondary cleaning on the shaving board and the impregnated paper, and the problems that in the prior art, only edge cleaning equipment is adopted for cleaning, the cleaning effect is poor, and the cleaning efficiency is high are solved. The problem that the plates are scrapped is solved, and the rejection rate of the plates is reduced.
Owner:JIANGSU GOLDENHOME KITCHEN CO LTD

Correct alignment device for large workpiece of vertical rotary machine tool and operation method of correct alignment device

The correct alignment device comprises a frame body, a first sliding groove is formed in the front end face of the upper side of the frame body, and a first upper sliding block and a second upper sliding block are slidably connected into the first sliding groove; supporting assemblies are fixedly connected to the front sides of the first upper sliding block and the second upper sliding block. Each supporting assembly comprises a fixing rod, a push rod, a rear sliding block and a turning tool rest. The fixing rods are fixedly connected to the front sides of the first upper sliding block and the second upper sliding block correspondingly. The push rod is slidably sleeved in the bottom side of the fixed rod; the rear slider is fixedly connected to the rear side of the push rod; the tool rest is fixedly connected to the bottom side of the push rod; by adjusting the position height of the blank workpiece, the problem that the workpiece is scrapped due to inaccurate machining when the blank workpiece is symmetrically corrected according to a clamping jaw or a cushion block when the irregular blank workpiece is machined by an existing lathe is solved. Machining of the blank workpiece is facilitated, and scrapping of the blank workpiece is avoided.
Owner:吴杰

Folding hinge for mobile phone

The application relates to a mobile phone outer folding screen rotating shaft which is provided with a connecting base, connecting plates arranged on the two sides of the connecting base, rotating assemblies arranged on the connecting base, rotating connection of the connecting plates on the connecting base, the rotating assembly comprising a limiting plate, a positioning shaft, a rotating plate, a sliding plate and a reset spring, rotating connection of each rotating plate on the corresponding positioning shaft, parallel arrangement of the sliding direction of each sliding plate with the axis of the positioning shaft, the first tooth part on the surface of each sliding plate away from the reset spring and circumferentially distributed on the sliding plate along the axis of the corresponding positioning shaft, the second tooth part on the rotating plate corresponding to each first tooth part and capable of being connected with the first tooth part, rotating connection of each connecting plate on the connecting base through the rotating plate and the positioning shaft, and self-locking of each sliding plate through the continuous force of the reset spring and the cooperation of each first tooth part and the corresponding second tooth part. The application is convenient, practical and has a clever structure.
Owner:JIANGSU GIAN POWER SYSTEM CO LTD

A combined tube supporting core rod extraction device for a choledochoscope

The application belongs to the technical field of medical devices, and particularly relates to a gall duct mirror composite tube supporting core rod extraction device, which comprises a supporting frame, a lower pressing block fixed to the supporting frame, a lifting driving mechanism and a driving assembly; the lifting driving mechanism comprises a servo electric cylinder and a pressure sensor, the servo electric cylinder is arranged below the supporting frame, an output end of the servo electric cylinder penetrates through the supporting frame and is connected with the pressure sensor, and the other end of the pressure sensor is connected with an upper pressing block assembly; the upper pressing block assembly can reciprocate vertically to the top surface direction of the lower pressing block, and a space for accommodating the gall duct mirror composite tube is formed between the upper pressing block assembly and the lower pressing block; a moving clamping assembly is slidably arranged on the driving assembly, an axis of the moving clamping assembly is collinear with an axis of the accommodating space and the moving clamping assembly can reciprocate along the direction, and the moving clamping assembly has a clamping part for clamping the supporting core rod. The servo electric cylinder and the pressure sensor are used for cooperatively controlling the pressing force, the supporting core rod extraction operation is automatically completed, the pipe material is effectively prevented from being damaged due to pressing, and the production quality and efficiency are improved.
Owner:NANJING KANGDING NEW MATERIAL TECH CO LTD

A replaceable mixing drum with a liner

ActiveCN224762941USolve scrapavoid direct contact
The utility model relates to the technical field of stirring drum, disclose a kind of replaceable stirring drum of lining, including cylinder, stirring mechanism, wherein, cylinder includes cylinder cover, barrel, cylinder bottom, lining, lining is located between cylinder cover, barrel, cylinder bottom three;Lining and barrel slip connection, cylinder cover detachably connected on barrel;When cylinder cover is installed on barrel, cylinder cover and the end close to lining of lining abuts. Through the above technical scheme, the problem that the whole stirring drum is scrapped due to the corrosion of the inner wall of the stirring drum in the prior art is solved.
Owner:FOSHAN GAOMING KELANG ENVIRONMENTAL PROTECTION TECH CO LTD

Detection method of wire arrangement mechanism of wire drawing machine and related equipment

The embodiment of the invention provides a detection method for a wire arranging mechanism of a wire drawing machine and related equipment, which are used for calculating the moving distance of the wire arranging mechanism and further detecting the problem of abnormity of the wire arranging mechanism. The method comprises the steps that the actual rotating speed value of a winding mechanism is obtained, and the real-time linear speed value of a wire arranging mechanism moving on a lead screw is calculated according to the actual rotating speed value; in a detection period, according to the real-time linear speed value, calculating a current moving distance of the wire arranging mechanism on the screw rod; if the current moving distance is larger than a preset width threshold value, system parking processing is conducted on the wire drawing machine system; wherein the preset width threshold value is associated with the width of a take-up reel of the take-up mechanism.
Owner:SHENZHEN HPMONT TECH

Automobile winch with self-adaptive torque control function

ActiveCN222293481USolve scrapAccurate control operationWinding mechanismsGear wheelElectric machinery
The utility model discloses a self-adaptive moment control automobile winch, and relates to the technical field of automobile winches, the self-adaptive moment control automobile winch comprises a setting plate and a clamping plate, the clamping plate is installed on the surface of the top end of the setting plate, a protective shell is installed on the surface of one side of the clamping plate, a moving groove is installed on the inner wall of the protective shell, and the moving groove is located in the setting plate. A rotating speed detector is installed on the surface of one side of the moving groove, and a controller is installed on the surface of the top end of the protective shell. When a heavy object is pulled, the reverse rotation speed detector can detect slow rotation of the rotation speed gear, so that the output power of the motor is increased through the controller again, self-adaptive control over the moment of the automobile winch is achieved, and the problems that in the prior art, an automobile winch cannot achieve self-adaptive control, and the torque of the automobile winch cannot be changed are solved. And the motor of the automobile winch forcibly drags to generate overload, so that the automobile winch is scrapped.
Owner:南通铭成金属制品科技有限公司

A method for eliminating microcracks inside electron beam welds of cobalt-based high-temperature alloys

The present invention provides a method for eliminating microcracks inside electron beam welds of cobalt-based high-temperature alloys. The method provided by the present invention comprises the following steps: a) hot isostatic pressing the welded part; wherein the welded part is a GH5188 alloy welded part; the conditions of the hot isostatic pressing treatment are: temperature 1150-1180°C, pressure 150-180MPa, and heat preservation and pressure holding time 2-5h; b) solution treatment of the welded part obtained in step a). The method provided by the present invention can effectively eliminate microcrack defects inside electron beam welds of cobalt-based high-temperature alloys, and at the same time can improve the mechanical properties of the welded joint without deteriorating the mechanical properties of the matrix.
Owner:AVIC BEIJING INST OF AERONAUTICAL MATERIALS

Oil drain valve block of hydraulic jack

ActiveCN222391668USolve scrapIncrease the installation heightServomotor componentsLifting devicesAxial displacementScrew thread
The utility model discloses an oil drain valve block of a hydraulic jack, which is used for being installed on a jack base, an oil drain channel and an oil return channel are arranged in the jack base, the oil drain valve block comprises a valve block body and an oil drain screw, and the valve block body is detachably installed on the jack base. An adjusting cavity, an oil inlet channel and an oil outlet channel are formed in the valve block body, the oil inlet channel and the oil outlet channel are communicated with the adjusting cavity, the oil inlet channel is communicated with the oil drainage channel, the oil outlet channel is communicated with the oil return channel, a screw hole communicated with the adjusting cavity is formed in the side portion of the valve block body, and the oil drainage screw is in threaded connection with the screw hole and is adjusted to make axial displacement. And the oil inlet channel and the oil outlet channel are connected or disconnected. The hydraulic jack not only solves the problem that the whole jack is scrapped due to the fact that an oil drainage screw of an existing jack is damaged, but also solves the problem that the oil drainage screw of the existing jack is too low, the oil drainage screw sinks into the ground after a base sinks in the process of using the jack, and pressure relief cannot be carried out.
Owner:LISHUI ZHONGDING HYDRAULIC TOOLS CO LTD

Auxiliary positioning jig for crystal bar

The utility model provides a crystal bar auxiliary positioning jig, which comprises a bearing seat and an attaching assembly arranged on the bearing seat, the attaching assembly comprises a base and an attaching structure arranged on the top of the base, the attaching structure is used for attaching a crystal bar, two sides of the base are step-shaped, first steps are arranged on two sides of the base, and the first steps are arranged on the base. A positioning assembly used for adjusting the position of a crystal bar is arranged on the first step and comprises a fixing base adsorbed to the first step and a telescopic structure with one end connected to the fixing base, the other end of the telescopic structure is connected with a connecting support, and the telescopic structure is used for lifting the connecting support. The connecting support is connected with an abutting assembly used for abutting against the crystal bar, the abutting assembly can advance or retreat towards the crystal bar on the connecting support, the fixing base is adsorbed to the first step, the height of the connecting support is adjusted through the telescopic structure, and therefore the abutting assembly connected to the connecting support in a threaded mode can abut against one side of the crystal bar.
Owner:JIANGXI ZHAO CHI SEMICON CO LTD

Punching equipment for sound box mesh enclosure production and processing

The utility model discloses punching equipment for producing and processing a sound box mesh enclosure, and relates to the technical field of sound box production. The punching device comprises a workbench, a bearing plate is fixed to the upper wall of the workbench, a movable plate is arranged above the bearing plate, an installation plate is arranged above the movable plate, punching needles are evenly fixed to the lower wall of the installation plate, penetrating holes are formed in the positions, corresponding to the punching needles, of the movable plate, and elastic pieces are evenly arranged on the edge of the upper wall of the movable plate. A positioning strip is fixed to the rear side of the upper wall of the bearing plate, positioning plates are symmetrically arranged on the left side and the right side of the upper wall of the bearing plate, a double-head motor is arranged below the workbench, and a screw is fixed to a power output shaft of the double-head motor and is in threaded connection with the positioning plates. The elastic piece provides acting force for the movable plate, so that the movable plate drives the sound box mesh enclosure to move, the sound box mesh enclosure is separated from the punching needle, and positioning of the sound box mesh enclosure is achieved through cooperation of the positioning plate and the positioning strip.
Owner:SHENZHEN YUANJIAHANG TECH CO LTD

A single-unit fuel injector

This utility model relates to the field of fuel injector technology and discloses a single-unit fuel injector, including an injector body. A fuel delivery pipe is fixedly connected to the bottom of the injector body, and a filling pipe is fixedly connected to the top of the injector body. A filter frame is fixedly connected to the top of the filling pipe. A locking block is slidably connected inside the fuel delivery pipe, and a nozzle is fixedly connected to the bottom of the locking block. A disassembly assembly is provided inside the fuel delivery pipe. The disassembly assembly includes a trapezoidal locking pin slidably connected inside the fuel delivery pipe, and a sliding sleeve slidably connected to the outer wall of the fuel delivery pipe. In this utility model, through the cooperation of the sliding sleeve, spring, and trapezoidal locking pin in the disassembly assembly, the injector nozzle can be replaced promptly when worn or damaged, thereby extending the overall service life of the injector. This solves the problem of traditional injector nozzles being difficult to replace, leading to the complete scrapping of the injector, and improves the economy and practicality of the injector.
Owner:DONGGUAN BOYE AUTO PARTS CO LTD

An ink path valve block structure, an inkjet printer, and a cleaning method

ActiveCN121572718BExtended service lifeSolve the problem of being unable to cleanOther printing apparatusComputer printingMechanical engineering
This application provides an ink path valve block structure, an inkjet printer, and a cleaning method, relating to the field of inkjet printing technology. By employing a stacked structure with a detachable top cover and valve block body, and featuring multiple interconnected ink path grooves and multiple ink outlets, as well as through-hole pairs and valve components on the top cover, the application effectively solves the problems of limited pipeline layout, difficulty in expansion, ink residue, and ineffective cleaning inherent in existing integrated drilled valve blocks. Furthermore, ink, under the influence of gravity, first fills the ink path grooves in the valve block body's flow channel before entering the valve component through the through-hole pairs and flowing downwards. This gravity-driven filling-before-discharge design ensures sufficient ink diffusion and uniform distribution, reduces dead zones and ink residue, and improves ink utilization.
Owner:JIHUA LAB

Material screening device

The present invention discloses a material screening device, comprising a device body, a sliding door and a screening device, wherein a feed port is provided at the top of the device body, the interior of the device body is a hollow structure, and at least one screening mechanism is provided inside the device body, and the screening mechanism evenly divides the interior of the device body into at least two screening bins; the top and bottom of the device body are located at the front side of the device body and are respectively provided with slide rails that are grooved with each other, a sliding door is installed inside the slide rail, a discharge port corresponding to the screening bin is provided on one side of the sliding door, and a discharge hopper is provided at the bottom of the discharge port outside the sliding door; a screening device is provided on one side of the device body, and a transmission mechanism is connected to one side of the screening device, and one end of the transmission mechanism passes through the device body and is fixedly connected to a fixed frame. The present invention can replace the screen and change the number of screens according to people's needs, thereby improving the efficiency of the material screening process.
Owner:WENZHOU POLYTECHNIC

Double-atomization electronic cigarette

ActiveCN224165682UAvoid the technical shortcomings of having to make equipment largercompact designTobaccoElectronic cigaretteMechanical engineering
The utility model discloses a double-atomization electronic cigarette. The double-atomization electronic cigarette comprises a first shell, a first atomizer and a detachable second atomizer, wherein the first atomizer and the detachable second atomizer are arranged in the first shell. Wherein the second atomizer is detachably arranged, so that the second atomizer can be freely disassembled and assembled as required. When the second atomizer is installed, the second air channel of the movable bin body is communicated with the first air channel at the top of the support, and normal work of the double atomizers is ensured; when the second atomizer is detached, the movable bin body can move relative to the support to enable the first air channel and the second air channel to be staggered and seal the first air channel, and therefore the first atomizer can be independently used, and the problem that in the prior art, due to the fact that tobacco tar of the second atomizer is exhausted, a whole machine is scrapped is solved; free replacement of the second atomizer is achieved through a detachable structure, meanwhile, the second atomizer can be designed to be smaller, and the technical defect that in order to be matched with tobacco tar consumption, a traditional double-atomization electronic cigarette has to be large in equipment size is effectively overcome. And sealing.
Owner:深圳市禾晗科技有限公司

A self-circulating cooling oil-water separation mesh belt furnace fan

The invention discloses a self-circulating cooling oil-water separation mesh belt furnace fan. A high temperature resistant inner tank is mounted on the main shaft of the mesh belt furnace fan. The high temperature resistant inner tank is connected to a cooling static oil circulation outer tank through a cold oil input pipeline and a hot oil output pipeline. The cooling static oil circulation outer tank is provided with a refueling exhaust hole, an oil discharge port and a thermocouple for detecting the internal oil temperature. The cooling oil is injected into the cooling static oil circulation outer tank through the refueling exhaust hole and enters the high temperature resistant inner tank through the cold oil input pipeline. When the mesh belt furnace fan is started, the heat emitted by the mesh belt furnace itself is transferred to the high temperature resistant inner tank to heat the cooling oil inside. The cooling oil expands due to heat and flows through the cold oil input pipeline and the hot oil output pipeline to realize self-circulation. The water in the cooling oil is converted into steam and discharged through the refueling exhaust hole. The cooling oil separated from oil and water is discharged through the oil discharge port. The cooling oil has the advantages of self-lubrication, fast heat dissipation and maintenance-free. The cooling oil with high water content can automatically separate oil and water and be self-circulated and reused.
Owner:HANGZHOU DONGHUA CHAIN GRP

An automatic transmission anti-reverse device and method for a TO series package sheet electroplating line

The present invention discloses an anti-reverse device and method for automatic transmission of a TO series packaging sheet electroplating line, wherein the anti-reverse device comprises a material storage body, a material taking mechanism, a conveying mechanism, a sheet fixture, and a processing conveying mechanism. According to the surface structure of the sheet, on the basis of stable stacking, the position of the reversed sheet is adjusted by the anti-reverse device, so that the sheet can be uniformly forward-transmitted, and at the same time, mechanical anti-reverse is used to detect the direction of the sheet during transmission, which can effectively and quickly intercept the reversed sheet to avoid the risk of misdetection or omission, and can effectively solve the problem of product scrapping caused by reverse loading of TO series packaging sheets, and has the advantages of low cost and high reliability of transmission without affecting the speed of the feeder.
Owner:华羿微电子股份有限公司

Horizontal vacuum multi-power extrusion device for casting rods

The invention relates to the technical field of extrusion devices, and particularly discloses a horizontal vacuum multi-power extrusion device for casting rods, which comprises a mold, an extrusion container, an extruder body, an extrusion rod and a vacuum pumping system, the mold is arranged at the outlet end of the extrusion container, a main cylinder is arranged on the extruder body, a plurality of main return cylinders are arranged on the outer side of the main cylinder, and a plurality of auxiliary return cylinders are arranged on the outer side of the main return cylinders; the extrusion rod is fixedly arranged on the main cylinder, a first hydraulic rod is arranged on the outer side of the extrusion rod, one end of the first hydraulic rod is connected with the main return cylinder, the other end of the first hydraulic rod is connected with the extrusion barrel, the main cylinder pushes the extrusion rod to stretch into the extrusion barrel to push a casting rod to move, a vacuumizing channel is formed in the extrusion rod, and an inlet of the vacuumizing channel is formed in the outer wall of the extrusion rod. The extrusion rod is arranged close to the extrusion end of the extrusion rod. The extrusion rod in the extrusion device extrudes towards the direction of the mold, and while a casting rod is pushed to be formed, gas in the inner cavity of the lining layer is subjected to vacuum extraction through the vacuum extraction system, so that the product quality and performance are improved.
Owner:ASIA PACIFIC LIGHT ALLOY NANTONG TECH

Scraper conveyor groove body repairing system and method combining cold metal transition welding and laser cladding

The invention relates to the field of tank body repair, in particular to a cold metal transition welding and laser cladding combined scraper conveyor tank body repair system and method. Comprising a defect visual identification device, a cold metal transition welding device, a laser cladding device and a turnover positioner, the cold metal transition welding device comprises a robot, a control cabinet, a robot upside-down hanging system and a welding gun, the robot is connected with the robot upside-down hanging system, the robot upside-down hanging system is connected with the control cabinet, and the robot is connected with the welding gun; the system solves the problem that according to an existing scraper conveyor groove body repairing process, continuous heat input is large, the groove body is greatly deformed, and consequently the scraper conveyor groove body is scrapped, and by combining the cold metal transition welding technology and the laser cladding technology, the system has the following advantages that 1, customized repairing can be conducted, and the repairing efficiency is improved; and the repairing quality and efficiency of the scraper conveyor groove body are greatly improved.
Owner:SHAANXI SHANMEI HUANGLING MINING IND CO LTD