Carving and polishing device
The jade is fixed by using a vacuum pump and a flexible rubber pad combined with the principle of negative pressure, which solves the problem of loose glue fixation, achieves stable and efficient processing of jade, and protects the jade and reduces environmental pollution through a cooling water circulation system.
Patent Information
- Application Number
- CN202422797786.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-18
AI Technical Summary
Existing polishing devices rely on glue to fix jade, resulting in loose fixation, which may cause the jade to move or fall off, affecting its appearance and value, and may corrode the jade.
A vacuum pump and a flexible rubber pad are used in combination with the negative pressure principle to fix the jade. The negative pressure generated by the vacuum pump makes the jade tightly adsorbed on the rubber pad, and an electric turntable is used to realize the processing of multiple jade materials. The water pump and cooling water circulation system are combined to improve the processing efficiency and lubricity.
It ensures the stability of jade during the processing, avoids the problems caused by glue fixation, improves work efficiency, and reduces the temperature of jade through the cooling water circulation system to protect the texture and luster of jade. At the same time, it realizes the reuse of cooling water and reduces wastewater discharge pollution.
Smart Images

Figure CN223419185U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of grinding devices, in particular to a carving and grinding device. Background Art
[0002] The grinding device is a kind of equipment widely used in industrial production and hardware processing. Its main function is to grind and polish the surface of the workpiece to improve the surface quality and finish of the workpiece.
[0003] According to the "A Jade Carving Machine" with the authorized patent number CN207942855U published on October 9, 2018, it includes a base, a first slide, a second slide, a third slide, a fourth slide, a workbench, a first linear drive mechanism, a second linear drive mechanism, a third linear drive mechanism, a fourth linear drive mechanism, a first rotation drive mechanism, a second rotation drive mechanism, a vacuum cleaner and a controller, and a processing head is provided on the third slide.
[0004] When carving and polishing jade articles using the above-mentioned equipment, users are required to use glue to stick the jade articles to the base. However, the fixing effect of the glue will be affected by many factors such as temperature, humidity, and glue quality. During the carving and polishing process, if the fixation is not firm, the jade articles may move or fall off, causing damage or safety hazards. Some glues may also corrode the jade, causing odor, discoloration or even damage on the surface of the jade articles, thereby affecting the overall appearance and value of the jade articles. Utility Model Content
[0005] The purpose of the utility model is to solve the problem that when the above-mentioned equipment is used, since it needs to use glue to fix the jade, which affects the fixing effect and causes corrosion to the jade, and thus a carving and polishing device is proposed.
[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a carving and polishing device, comprising:
[0007] water tank;
[0008] A metal filter plate, the metal filter plate is fixedly inserted into the inner surface wall of the water tank, a base frame is fixedly installed on the top of the metal filter plate, an electric turntable is fixedly installed on the top of the base frame, a top plate is fixedly installed on the top of the electric turntable, the outer wall of the top plate is fixedly connected to a group of air inlet one-way valves, a plurality of groups of air holes are opened on the top of the top plate, a group of rubber pads are provided on the top of the top plate, a group of air outlet one-way valves are fixedly connected to the top of the top plate, and a group of air cavities are opened inside the top plate;
[0009] A vacuum pump is fixedly installed on one side of the outer wall of the water tank, the output end of the vacuum pump is fixedly connected to an air inlet pipe, the output end of the air inlet pipe is fixedly connected to a first connector, the input end of the vacuum pump is fixedly connected to an air outlet pipe, the input end of the air outlet pipe is fixedly connected to a second connector, and is used to drive the air flow in the air cavity, so that a group of rubber pads are adsorbed or separated from the jade article.
[0010] Preferably, the output end of the water tank is fixedly connected to a water inlet pipe, a support frame is fixedly installed on one side of the outer wall of the water tank, a motor 1 is fixedly installed on the bottom of the inner wall of the support frame, a threaded rod is fixedly installed on the output end of the motor 1, and the outer wall of the threaded rod is movably inserted into the interior of the support frame.
[0011] Preferably, a group of guide columns 1 are fixedly installed between the inner surface walls of the support frame, a movable block 1 is movably sleeved between the outer surface walls of the group of guide columns 1, and the outer surface wall of the threaded rod is threadedly connected to the inner surface wall of the movable block 1, and the outer surface wall of the movable block 1 is movably inserted into the interior of the support frame.
[0012] Preferably, a mounting plate 1 is fixedly mounted on one side of the outer wall of the movable block 1, two movable holes 1 are opened on the top of the mounting plate 1, a pulley 1 is fixedly inserted into the inner wall of the two movable holes 1, a connecting belt 1 is movably sleeved between the outer walls of the two pulleys 1, a motor 2 is fixedly mounted on the top of the mounting plate 1, and the output end of the motor 2 is fixedly connected to the top of one of the two pulleys 1.
[0013] Preferably, two guide columns 2 are fixedly installed on the bottom of the mounting plate 1, a movable block 2 is provided on the outer wall of the connecting belt 1, and the two guide columns 2 are movably inserted between the outer walls of the movable block 2, a mounting plate 2 is fixedly installed on the bottom of the movable block 2, and two movable holes 2 are provided on the top of the mounting plate 2.
[0014] Preferably, the inner walls of the two movable holes 2 are fixedly inserted with pulleys 2, and a connecting belt 2 is movably sleeved between the outer walls of the two pulleys 2. A motor 3 is fixedly installed on the top of the mounting plate 2, and the output end of the motor 3 is fixedly connected to the top of one of the two pulleys 2. Two guide columns 3 are fixedly installed on the bottom of the mounting plate 2.
[0015] Preferably, the outer wall of the connecting belt 2 is provided with a movable block 3, and the two guide columns 3 are movably inserted between the outer walls of the guide columns 3 and inside the movable block 3.
[0016] Preferably, the output end of the water inlet pipe is fixedly connected to a water pump, and one side of the outer wall of the water pump is fixedly connected to one side of the outer wall of the movable block three, and the output end of the water pump is fixedly connected to a water outlet pipe.
[0017] Preferably, the bottom of the movable block three is provided with a polishing head, and the inner wall of the water tank is fixedly provided with an activated carbon adsorption plate.
[0018] Preferably, the outer wall of the water tank is fixedly provided with two top plates, one inner wall of the two top plates is movably provided with the outer wall of the air inlet pipe, and the other inner wall of the two top plates is movably provided with the outer wall of the air outlet pipe.
[0019] Compared with the prior art, the utility model has the advantages and positive effects that,
[0020] In the utility model, the jade material is tightly adsorbed on the flexible rubber pad by starting the vacuum pump and utilizing the negative pressure principle, and after the jade material is processed, the pressure generated by the vacuum pump can be used to quickly take down the jade material, workers can fix multiple jade materials, the stability of the jade material in the processing process is ensured, the problems of unstable fixing, corrosion of the jade material and the like caused by traditional fixing modes such as glue are avoided, and through the rotation of the electric turntable, the processing of multiple jade materials at a time is realized, and the work efficiency is greatly improved.
[0021] In the utility model, the cooling water circulation system of the water pump effectively increases the lubricity in the processing process by extracting the cooling water in the water tank and spraying the cooling water on the surface of the jade material, reduces the temperature of the jade material, protects the texture and gloss of the jade material, meanwhile, the filtering and sterilization and deodorization of the metal filter plate and the activated carbon adsorption plate realize the reuse of the cooling water, reduce the use cost of water resources, and reduce the environmental pollution caused by wastewater discharge. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 A front view structure perspective view of the carving and polishing device is provided for the utility model;
[0023] Figure 2 A top view perspective view of the carving and polishing device is provided for the utility model;
[0024] Figure 3 A partial bottom view perspective view of the carving and polishing device is provided for the utility model;
[0025] Figure 4 A partial split schematic view of the carving and polishing device is provided for the utility model;
[0026] Figure 5 A partial sectional view perspective view of the carving and polishing device is provided for the utility model;
[0027] Figure 6 A partial perspective schematic view of the carving and polishing device is provided for the utility model.
[0028] LEGEND:
[0029] 1. Water tank; 2. Water inlet pipe; 3. Support frame; 4. Motor 1; 5. Threaded rod; 6. Guide column 1; 7. Movable block 1; 8. Mounting plate 1; 9. Movable hole 1; 10. Pulley 1; 11. Connecting belt 1; 12. Motor 2; 13. Guide column 2; 14. Movable block 2; 15. Mounting plate 2; 16. Movable hole 2; 17. Motor 3; 18. Pulley 2; 19. Guide column 3; 20. Connecting belt 2 21. Movable block three; 22. Water pump; 23. Water outlet pipe; 24. Grinding head; 25. Metal filter plate; 26. Activated carbon adsorption plate; 27. Vacuum pump; 28. Inlet pipe; 29. Connector one; 30. Support sleeve; 31. Outlet pipe; 32. Connector two; 33. Base frame; 34. Electric turntable; 35. Top plate; 36. Inlet check valve; 37. Air hole; 38. Rubber pad; 39. Outlet check valve; 40. Air cavity. DETAILED DESCRIPTION
[0030] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.
[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.
[0032] Example 1, as Figures 1-6 As shown, the utility model provides a carving and polishing device, comprising a water tank 1;
[0033] The metal filter plate 25 is fixedly inserted into the inner wall of the water tank 1. A base frame 33 is fixedly installed on the top of the metal filter plate 25. An electric turntable 34 is fixedly installed on the top of the base frame 33. A top plate 35 is fixedly installed on the top of the electric turntable 34. The outer wall of the top plate 35 is fixedly connected to a group of air inlet check valves 36. A plurality of air holes 37 are opened on the top of the top plate 35. A group of rubber pads 38 are provided on the top of the top plate 35. A group of air outlet check valves 39 are fixedly connected to the top of the top plate 35. A group of air cavities 40 are opened inside the top plate 35.
[0034] The vacuum pump 27 is fixedly installed on one side of the outer wall of the water tank 1. The output end of the vacuum pump 27 is fixedly connected to the air inlet pipe 28, and the output end of the air inlet pipe 28 is fixedly connected to the connector 1 29. The input end of the vacuum pump 27 is fixedly connected to the air outlet pipe 31, and the input end of the air outlet pipe 31 is fixedly connected to the connector 2 32, which is used to drive the air flow in the air cavity 40, so that a group of rubber pads 38 are adsorbed or separated from the jade article.
[0035] The effect achieved by the entire embodiment 1 is that when a worker needs to process a rectangular jade material, he can first start the vacuum pump 27. At this time, the vacuum pump 27 can suck the outside air into the interior through the air inlet pipe 28 and discharge it through the air outlet pipe 31. At this time, the worker can first fit the bottom of the jade material with the rubber pad 38. Rubber is a flexible material and can avoid gaps on the contact surface with the jade material. Then, the joint 29 provided on the air inlet pipe 28 is put on the surface of the air outlet one-way valve 39. At this time, due to the action of the vacuum pump 27, the air inside the air cavity 40 will be discharged through the air outlet one-way valve 39, so that a negative pressure is formed in the air cavity 40. Then, the air between the rubber pad 38 and the jade material will pass through the air hole 37 under the action of pressure, and be discharged through the air cavity 40 and the air outlet one-way valve 39, so that a negative pressure is formed inside the rubber pad 38, which tightly adsorbs the jade material on its surface, avoiding the jade material from being processed. During work, since the air inlet check valve 36 is a carefully designed valve body, its starting pressure is much greater than that of the air outlet check valve 39. Therefore, the negative pressure inside the air cavity 40 is not enough to start the air inlet check valve 36. Workers can use the same method to fix multiple jade materials. The electric turntable 34 can drive the jade materials to rotate, so that the device can process multiple jade materials at a time. After the jade materials are processed, the user can start the vacuum pump 27 again. At this time, the joint 2 32 set on the air outlet pipe 31 can be put on the surface of the air inlet check valve 36. Under the impact of external gas, the air inlet check valve 36 is smoothly opened, so that the air pressure inside the air cavity 40 and the rubber pad 38 returns to normal, thereby facilitating the removal of the processed jade materials. The device absorbs the jade materials through negative pressure, which not only reduces the time for fixing and removing the jade materials, but also avoids the situation of loose fixation and corrosion of the jade materials caused by the use of glue.
[0036] Example 2, as Figure 2-Figure 6As shown, the output end of the water tank 1 is fixedly connected to the water inlet pipe 2, a support frame 3 is fixedly installed on one side of the outer wall of the water tank 1, a motor 4 is fixedly installed on the bottom of the inner wall of the support frame 3, a threaded rod 5 is fixedly installed on the output end of the motor 4, and the outer wall of the threaded rod 5 is movably inserted into the interior of the support frame 3, a group of guide columns 6 are fixedly installed between the inner walls of the support frame 3, a movable block 7 is movably sleeved between the outer walls of a group of guide columns 6, and the outer wall of the threaded rod 5 is threadedly connected to the inner wall of the movable block 7, and the outer wall of the movable block 7 is movably inserted into the interior of the support frame 3, and one side of the outer wall of the movable block 7 A mounting plate 8 is fixedly installed, and two movable holes 9 are provided on the top of the mounting plate 8. The inner surface walls of the two movable holes 9 are fixedly inserted with pulleys 10. A connecting belt 11 is movably sleeved between the outer surfaces of the two pulleys 10. A motor 2 12 is fixedly installed on the top of the mounting plate 8, and the output end of the motor 2 12 is fixedly connected to the top of one of the two pulleys 10. Two guide columns 2 13 are fixedly installed on the bottom of the mounting plate 8. A movable block 2 14 is provided on the outer surface wall of the connecting belt 11, and the outer surfaces of the two guide columns 2 13 are movably inserted into the interior of the movable block 2 14. The bottom of the movable block 14 is fixedly installed with a mounting plate 15, and the top of the mounting plate 15 is provided with two movable holes 16. The inner surface walls of the two movable holes 16 are fixedly inserted with pulleys 18. The outer surface walls of the two pulleys 18 are movably sleeved with a connecting belt 20. The top of the mounting plate 15 is fixedly installed with a motor 3 17, and the output end of the motor 3 17 is fixedly connected to the top of one of the two pulleys 18. The bottom of the mounting plate 15 is fixedly installed with two guide columns 3 19. The outer surface wall of the connecting belt 20 is provided with a movable block 3 21, and the outer surface of the two guide columns 3 19 is fixedly connected to the top of the two pulleys 20. The walls are movably inserted inside the movable block three 21, the output end of the water inlet pipe 2 is fixedly connected to the water pump 22, and one side of the outer wall of the water pump 22 is fixedly connected to one side of the outer wall of the movable block three 21, the output end of the water pump 22 is fixedly connected to the water outlet pipe 23, and a grinding head 24 is provided at the bottom of the movable block three 21. An activated carbon adsorption plate 26 is fixedly inserted on the inner wall of the water tank 1, and two top plates 35 are fixedly installed on one side of the outer wall of the water tank 1, and one of the inner walls of the two top plates 35 is movably inserted with the outer wall of the air inlet pipe 28, and the other inner wall of the two top plates 35 is movably inserted with the outer wall of the air outlet pipe 31.
[0037] The effect achieved by the entire embodiment 2 is that after the motor 14 is started, it can drive the threaded rod 5 to rotate. When the threaded rod 5 rotates, it can cooperate with the guide column 16 to drive the mounting plate 18 to move up and down, and adjust the height of the grinding head 24. After the motor 212 is started, it can drive a pulley 10 to rotate. At this time, the rotating pulley 10 makes the other pulley 10 and the connecting belt 11 move. The connecting belt 11 can cooperate with the guide column 213 to move the mounting plate 215 and the lower mechanism, thereby adjusting the horizontal position of the grinding head 24. After the motor 317 is started, it can use the same method to drive the pulley 218 to rotate, and drive The connecting belt 20 moves, and the connecting belt 20 enables the movable block 3 21 to drive the grinding head 24 below to move longitudinally, thereby realizing the precise processing of the jade material. When the grinding head 24 is working, the water pump 22 can use the water inlet pipe 2 to extract the cooling water inside the water tank 1, and then the cooling water is sprayed onto the surface of the jade material through the water outlet pipe 23, thereby increasing lubrication and timely reducing the temperature of the jade material. The used cooling water will fall into the water tank 1 again. At this time, the metal filter plate 25 can filter out pollutants such as jade chips and dust in the water, and the activated carbon adsorption plate 26 can sterilize and deodorize the cooling water, so that it can be reused, reducing the cost of water resource use and reducing the pollution of wastewater discharge.
[0038] Working principle: In the process of processing rectangular jade materials, the worker first starts the vacuum pump 27, which sucks in external air through the air inlet pipe 28 and discharges it through the air outlet pipe 31. Then, the worker fits the bottom of the jade material tightly with the flexible rubber pad 38 to ensure that there is no gap in the contact surface. Next, the joint 29 on the air inlet pipe 28 is put on the surface of the air outlet one-way valve 39. Under the action of the vacuum pump 27, the air inside the air cavity 40 is discharged through the air outlet one-way valve 39 to form a negative pressure. The air between the rubber pad 38 and the jade material passes through the air hole 37 under the action of pressure and enters the air cavity 40 and is discharged. Negative pressure is also formed inside the rubber pad 38, which tightly adsorbs the jade material. The air inlet one-way valve 36 is designed with a higher starting pressure to ensure that negative pressure does not start. Workers can use the same method to fix multiple jade materials, and the electric turntable 34 drives the rotation for easy processing. After the processing is completed, start the vacuum pump 27 again, and put the joint 2 32 on the air outlet pipe 31 on the surface of the air inlet one-way valve 36. Under the impact of external gas, the air inlet one-way valve 36 opens , the air pressure inside the air cavity 40 and the rubber pad 38 returns to normal, and the worker can easily remove the jade material. After the motor 1 is started, it drives the threaded rod 5 to rotate, and works in conjunction with the guide column 16 to push the mounting plate 18 up and down to accurately adjust the height of the grinding head 24; the motor 2 12 is started, driving the pulley 10 to rotate, and transmitting power through the connecting belt 11 to drive the mounting plate 2 15 and the mechanism below it to move under the guidance of the guide column 2 13 to adjust the horizontal position of the grinding head 24; the motor 3 17 is started, and the transmission of the pulley 2 18 and the connecting belt 2 20 is used to make the movable block 3 21 drive the grinding head 24 to move longitudinally, ensuring the precise processing of the jade material. At the same time, the water pump 22 draws cooling water from the water tank 1 through the water inlet pipe 2, and sprays it on the surface of the jade material through the water outlet pipe 23 to increase lubrication and cool down. The used cooling water flows back to the water tank 1, is filtered by the metal filter plate 25 to remove jade chips and dust, and is then sterilized and deodorized by the activated carbon adsorption plate 26 to achieve the reuse of cooling water.
[0039] The wiring diagram of motor 1 4, motor 2 12, motor 3 17, water pump 22, vacuum pump 27 and electric turntable 34 in the present invention is common knowledge in the field, and its working principle is a well-known technology. The models are selected according to actual use. Therefore, the control method and wiring arrangement of motor 1 4, motor 2 12, motor 3 17, water pump 22, vacuum pump 27 and electric turntable 34 will not be explained in detail.
[0040] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.
Claims
1. A carving and polishing device, characterized in that: include: Water tank (1); A metal filter plate (25), the metal filter plate (25) is fixedly inserted into the inner surface wall of the water tank (1), a bottom frame (33) is fixedly installed on the top of the metal filter plate (25), an electric turntable (34) is fixedly installed on the top of the bottom frame (33), a top plate (35) is fixedly installed on the top of the electric turntable (34), an outer surface wall of the top plate (35) is fixedly connected to a group of air inlet one-way valves (36), a top of the top plate (35) is provided with a plurality of groups of air holes (37), a top of the top plate (35) is provided with a group of rubber pads (38), a top of the top plate (35) is fixedly connected to a group of air outlet one-way valves (39), and a group of air cavities (40) are provided inside the top plate (35); A vacuum pump (27) is fixedly installed on one side of the outer wall of the water tank (1), the output end of the vacuum pump (27) is fixedly connected to an air inlet pipe (28), the output end of the air inlet pipe (28) is fixedly connected to a connector 1 (29), the input end of the vacuum pump (27) is fixedly connected to an air outlet pipe (31), and the input end of the air outlet pipe (31) is fixedly connected to a connector 2 (32), which is used to drive the air flow in the air cavity (40) so that a group of the rubber pads (38) are adsorbed on or separated from the jade article.
2. The engraving and polishing device according to claim 1, characterized in that: The output end of the water tank (1) is fixedly connected to a water inlet pipe (2), a support frame (3) is fixedly mounted on one side of an outer wall of the water tank (1), a motor (4) is fixedly mounted on the bottom of an inner wall of the support frame (3), a threaded rod (5) is fixedly mounted on the output end of the motor (4), and an outer wall of the threaded rod (5) is movably inserted into the interior of the support frame (3).
3. The engraving and polishing device according to claim 2, characterized in that: A group of guide columns (6) are fixedly installed between the inner surface walls of the support frame (3), and a movable block (7) is movably sleeved between the outer surface walls of the group of guide columns (6), and the outer surface wall of the threaded rod (5) is threadedly connected to the inner surface wall of the movable block (7), and the outer surface wall of the movable block (7) is movably inserted into the interior of the support frame (3).
4. The engraving and polishing device according to claim 3, characterized in that: A mounting plate (8) is fixedly mounted on one side of the outer wall of the movable block (7), two movable holes (9) are provided on the top of the mounting plate (8), a pulley (10) is fixedly inserted into the inner surface walls of the two movable holes (9), a connecting belt (11) is movably sleeved between the outer surfaces of the two pulleys (10), a motor (12) is fixedly mounted on the top of the mounting plate (8), and the output end of the motor (12) is fixedly connected to the top of one of the two pulleys (10).
5. The engraving and polishing device according to claim 4, characterized in that: Two guide columns (13) are fixedly mounted on the bottom of the mounting plate (8), a movable block (14) is provided on the outer wall of the connecting belt (11), and the outer walls of the two guide columns (13) are movably inserted into the interior of the movable block (14), a mounting plate (15) is fixedly mounted on the bottom of the movable block (14), and two movable holes (16) are provided on the top of the mounting plate (15).
6. The engraving and polishing device according to claim 5, characterized in that: The inner walls of the two movable holes (16) are fixedly inserted with pulleys (18), and the outer walls of the two pulleys (18) are movably sleeved with connecting belts (20). The top of the mounting plate (15) is fixedly mounted with a motor (17), and the output end of the motor (17) is fixedly connected to the top of one of the two pulleys (18). The bottom of the mounting plate (15) is fixedly mounted with two guide columns (19).
7. The engraving and polishing device according to claim 6, characterized in that: The outer wall of the connecting belt 2 (20) is provided with a movable block 3 (21), and the outer walls of the two guide columns 3 (19) are movably inserted into the interior of the movable block 3 (21).
8. The engraving and polishing device according to claim 7, characterized in that: The output end of the water inlet pipe (2) is fixedly connected to a water pump (22), and one side of the outer wall of the water pump (22) is fixedly connected to one side of the outer wall of the movable block three (21). The output end of the water pump (22) is fixedly connected to a water outlet pipe (23).
9. The engraving and polishing device according to claim 8, characterized in that: A grinding head (24) is provided at the bottom of the movable block three (21), and an activated carbon adsorption plate (26) is fixedly inserted into the inner surface wall of the water tank (1).
10. The engraving and polishing device according to claim 9, characterized in that: Two top plates (35) are fixedly mounted on one side of the outer wall of the water tank (1), and the inner surface wall of one of the two top plates (35) is movably inserted into the outer surface wall of the air inlet pipe (28), while the inner surface wall of the other of the two top plates (35) is movably inserted into the outer surface wall of the air outlet pipe (31).
Citation Information
Patent Citations
Jade carving machine
CN207942855U