CN114890663A - Quartz boat forming auxiliary equipment for solar cell silicon wafer diffusion - Google Patents
Quartz boat forming auxiliary equipment for solar cell silicon wafer diffusion Download PDFInfo
- Publication number
- CN114890663A CN114890663A CN202210519807.0A CN202210519807A CN114890663A CN 114890663 A CN114890663 A CN 114890663A CN 202210519807 A CN202210519807 A CN 202210519807A CN 114890663 A CN114890663 A CN 114890663A
- Authority
- CN
- China
- Prior art keywords
- supporting
- supporting plate
- groove
- quartz boat
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 239000010453 quartz Substances 0.000 title claims abstract description 32
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 238000009792 diffusion process Methods 0.000 title claims abstract description 17
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 17
- 239000010703 silicon Substances 0.000 title claims abstract description 17
- 238000003466 welding Methods 0.000 claims abstract description 27
- 238000000465 moulding Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 2
- 239000000741 silica gel Substances 0.000 claims description 2
- 229910002027 silica gel Inorganic materials 0.000 claims description 2
- 235000012431 wafers Nutrition 0.000 description 7
- 239000002253 acid Substances 0.000 description 2
- 229910021419 crystalline silicon Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000028571 Occupational disease Diseases 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/20—Uniting glass pieces by fusing without substantial reshaping
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)
Abstract
The invention provides quartz boat forming auxiliary equipment for solar cell silicon wafer diffusion processing, which comprises: the supporting unit is used for carrying out work support on the quartz boat fittings; the rotation control unit is used for adjusting the angle of the quartz boat fitting during welding and is arranged at the top of the supporting unit; and the auxiliary unit is used for adjusting and supporting the welding of the accessories and is arranged at the top of the rotary control unit. The inclination angles of the outer connecting rod and the inner connecting rod can be adjusted by adjusting the nuts of the cross columns, namely, the heights of the first supporting plate and the second supporting plate are adjusted, the rotation design of the rotating arm and the upright column is arranged, the welding angle can be adjusted, the elastic units arranged below the first supporting plate and the second supporting plate can elastically support the arm, the auxiliary units can allow the arm to be adjusted vertically and slightly after being integrally fixed, and the adaptability of the welding working condition is improved.
Description
Technical Field
The invention relates to the field of solar cell silicon wafer processing, in particular to quartz boat forming auxiliary equipment for solar cell silicon wafer diffusion processing.
Background
The solar cell is mainly divided into a crystalline silicon type and an amorphous silicon type, wherein the crystalline silicon type cell undergoes a diffusion process in the processing process, and a quartz boat is applied in the diffusion process, and the solar cell silicon wafer is subjected to diffusion processing by utilizing the quartz boat.
Most of the existing quartz boats exist as trays in solar cell silicon wafer production, and in the molding of the quartz boats, flame welding needs to be carried out on quartz glass fittings in different shapes by means of workers, thereby forming the quartz boats in the required specific shapes, the workers in the process need to hold flame hot melting spray guns to carry out hot melting welding on joints of different fittings, the welding requirements of the workers on long-time alignment during working are considered, the arms of the workers can be hung for a long time to carry out flame welding, further the arms can be expanded with acid, arm occupational diseases can be caused for a long time, the occupational health of the workers is damaged, and the long-time hanging alignment can also interfere with the efficiency and the precision of the flame welding under the influence of the arm expansion with acid.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides quartz boat forming auxiliary equipment for diffusion processing of solar cell silicon wafers.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a quartz boat shaping auxiliary assembly for solar cell silicon chip diffusion processing, includes:
the supporting unit is used for carrying out work support on the quartz boat fittings;
the rotation control unit is used for adjusting the angle of the quartz boat fitting during welding and is arranged at the top of the supporting unit;
the auxiliary unit is used for adjusting and supporting the welding of the accessories and is arranged at the top of the rotary control unit:
the auxiliary unit comprises a first supporting plate and a second supporting plate, the first supporting plate and the second supporting plate are used for supporting the operation-welded arm, the tops of the first supporting plate and the second supporting plate are movably connected through groove columns and sleeves, the sleeves are connected through rotating arms and stand columns, and supporting units are fixedly arranged at the bottoms of the stand columns.
Preferably, one end of the groove column, which is far away from the sleeve, is provided with a groove, two sides of the groove are provided with a cross column in a penetrating manner, and the inner side of the groove is connected with an inner link rod matched with a through hole of the cross column;
the inner side of the groove is connected with an outer link rod matched with the cross column through hole.
Preferably, the outer connecting rods are symmetrically arranged along the center line of the groove column, the symmetrically arranged outer connecting rods are in perforation fit with the folded plate through the transverse column, at least one group of telescopic rods are arranged at the top of the folded plate, the outer surfaces of the telescopic rods are spirally wound with the elastic units, and the telescopic rods and one ends of the elastic units, which are far away from the folded plate, are elastically connected with the first supporting plate;
the inner link rod is matched with the extending plate through holes symmetrically formed in the bottom of the supporting plate base through the cross column, and the groove surface of the supporting plate base is elastically connected with the second supporting plate through the elastic unit.
Preferably, the supporting unit comprises a bottom groove, the surface of the supporting unit is provided with the bottom groove, the center of the bottom groove is provided with the rotating unit, and the top of the rotating unit is synchronously provided with the supporting rod;
the top welding of bracing piece has the workstation, the mounting groove has been seted up on the surface of workstation.
Preferably, the mounting groove is arranged on the surface of the workbench in a crossed manner, and the top of the mounting groove is provided with a clamping block which is matched with the mounting groove and used for placing quartz boat assembly accessories;
a base column is arranged on one side of the bottom groove, which is far away from the supporting rod, and a base plate is fixed at the top end of the base column.
Preferably, the rotation control unit comprises at least one group of rotating arms, and the rotating arms are fixedly connected with the supporting rod through the rotation control unit;
the rotating arm is in sliding fit with the bottom groove through a groove block arranged at the bottom of one side, far away from the supporting rod, of the rotating arm.
Preferably, the auxiliary units are symmetrically arranged with a central line of the seat plate, and the first supporting plate and the second supporting plate are composed of outer metal and inner silica gel.
The invention has the beneficial effects that:
(1) the invention can adjust the inclination angles of the outer link rod and the inner link rod by adjusting the nuts of the cross columns, namely, the heights of the first supporting plate and the second supporting plate are adjusted, the rotating design of the rotating arm and the upright column is arranged, so that the welding angle can be adjusted, the elastic units arranged under the first supporting plate and the second supporting plate can elastically support the arm, and the auxiliary units can allow the arm to be adjusted vertically in a small range after being integrally fixed, so that the adaptability of the welding working condition is improved.
(2) According to the invention, the groove block is pushed by the legs to rotate in the bottom groove, so that the groove block drives the supporting rod to rotate under the coordination of the rotating unit through the rotating arm, the angle of the workbench at the top of the supporting rod is changed, and the quartz boat fittings on the workbench can be conveniently welded in all directions under the condition that workers keep in situ.
(3) According to the invention, the arm is placed in the first supporting plate and the second supporting plate, so that the first supporting plate supports the small arm, and the second supporting plate supports the joints of the large arm and the small arm, further, the arm of a worker can be supported when the flame welding is operated, and the burden of hanging the arm for a long time is reduced.
In conclusion, the invention has the advantages of less arm suspension burden and comprehensive welding.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic isometric view of FIG. 1;
FIG. 3 is an enlarged view of portion A of FIG. 2;
fig. 4 is an enlarged schematic view of a portion B in fig. 3.
In the figure:
1. a support unit; 101. a bottom groove; 102. a rotation unit; 103. a support bar; 104. a work table; 1041. mounting grooves; 1042. a clamping block; 105. a base post; 106. a seat plate;
2. a rotation control unit; 201. a rotating arm; 202. a groove block;
3. an auxiliary unit; 301. a column; 302. a rotating arm; 303. a sleeve; 304. a groove column; 3041. a cross post; 305. an outer link; 3051. folding the plate; 3052. a telescopic rod; 3053. an elastic unit; 3054. a first pallet; 306. an inner link; 3061. a pallet base; 3062. a second pallet; 3063. an extension plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example one
As shown in fig. 1 to 4, the present embodiment provides a quartz boat molding auxiliary apparatus for solar cell silicon wafer diffusion processing, comprising: the support unit 1 is used for carrying out work support on quartz boat accessories;
the rotation control unit 2 is used for adjusting the angle of the quartz boat fitting during welding and is arranged at the top of the support unit 1;
an auxiliary unit 3, wherein the auxiliary unit 3 for adjusting and supporting the welding of the fittings is arranged at the top of the rotation control unit 2:
the auxiliary unit 3 comprises a first supporting plate 3054 and a second supporting plate 3062, the first supporting plate 3054 and the second supporting plate 3062 are used for supporting an arm for welding, the tops of the first supporting plate 3054 and the second supporting plate 3062 are movably connected through a groove column 304 and a sleeve 303, the sleeve 303 is connected with a vertical column 301 through a rotating arm 302, and the bottom of the vertical column 301 is fixedly provided with a supporting unit 1.
A groove is formed in one end, away from the sleeve 303, of the groove column 304, a cross column 3041 penetrates through two sides of the groove, an inner link 306 in perforation fit with the cross column 3041 is connected to the inner side of the groove, and an outer link 305 in perforation fit with the cross column 3041 is connected to the inner side of the groove; the through hole fit is preferably the engagement of a threaded hole and a threaded rod;
the outer links 305 are symmetrically arranged along the center line of the slot column 304, the symmetrically arranged outer links 305 are in perforation fit through a cross column 3041 and a folded plate 3051, at least one set of telescopic rods 3052 is arranged at the top of the folded plate 3051, the number of the telescopic rods 3052 is preferably 4, the outer surface of each telescopic rod 3052 is spirally wound with an elastic unit 3053, each elastic unit 3053 is preferably a spring, and one ends of the telescopic rods 3052 and the elastic units 3053, which are far away from the folded plate 3051, are elastically connected with a first supporting plate 3054;
the inner link 306 is perforated and matched with an extending plate 3063 symmetrically arranged at the bottom of the supporting plate base 3061 through a cross column 3041, and the groove surface of the supporting plate base 3061 is elastically connected with a second supporting plate 3062 through an elastic unit 3053.
It should be noted that: the grooves of the first supporting plate 3054 and the second supporting plate 3062 are arc-shaped, and the left side and the right side of the cross column 3041 are both provided with nuts which are fastened and adjusted by threads, so that the rotational freedom degree of the connecting structure with the cross column 3041 can be fixed or adjusted conveniently; the sleeve 303 and the rotating arm 302 are connected by welding, and the rotating arm 302 and the upright 301 are connected by rotation, so that the upright 301 is matched with a mounting hole formed in the surface of the rotating arm 302 through a bearing arranged on the outer side of the upright 301;
when a worker needs to perform a flame welding operation, the worker can place arms inside the first supporting plate 3054 and the second supporting plate 3062, so that the first supporting plate 3054 supports the small arm, the second supporting plate 3062 supports the joints of the large and small arms, thereby enabling the arm of the worker to be supported when operating the flame welding, reducing the burden of hanging the arm for a long time, and adjusting the nuts of the cross-post 3041 allows the inclination of the outer link 305 and the inner link 306 to be adjusted, i.e., the height of the first palette 3054 and the second palette 3062, and the rotation design of the swivel arm 302 and the upright 301, the welding angle can be adjusted, the elastic unit 3053 arranged under the first supporting plate 3054 and the second supporting plate 3062 can elastically support the arm, and the auxiliary unit 3 can allow the arm to be adjusted in small amplitude up and down after being integrally fixed, so that the adaptability of the welding working condition is improved.
The supporting unit 1 comprises a bottom groove 101, the bottom groove 101 is formed in the surface of the supporting unit 1, a rotating unit 102 is arranged in the center of the bottom groove 101, the rotating unit 102 is preferably a bearing, and a supporting rod 103 is synchronously arranged at the top of the rotating unit 102;
the top of the support rod 103 is welded with a workbench 104, and the surface of the workbench 104 is provided with a mounting groove 1041.
The shape of the workbench 104 is circular, the mounting grooves 1041 are crosswise arranged on the surface of the workbench 104, and the top of the mounting groove 1041 is provided with a clamping block 1042 which is matched with the mounting groove and is used for placing a quartz boat assembly;
a base column 105 is arranged on one side of the bottom groove 101 far away from the support rod 103, and a base plate 106 is fixed at the top end of the base column 105.
The rotation control unit 2 comprises at least one group of rotating arms 201, and the rotating arms 201 are fixedly connected with the supporting rod 103 through the rotation control unit 2;
the rotating arm 201 is in sliding fit with the bottom groove 101 through a groove block 202 arranged at the bottom of one side of the rotating arm, which is far away from the supporting rod 103; the shape of the bottom groove 101 is preferably circular;
what needs to be supplemented is: the number of the rotating arms 201 is five, after the workers weld the fittings facing the surfaces of the workers on the workbench 104, the groove blocks 202 can be pushed by the legs to rotate in the bottom groove 101, so that the groove blocks 202 drive the supporting rods 103 to rotate under the matching of the rotating units 102 through the rotating arms 201, the angles of the workbench 104 on the tops of the supporting rods 103 are changed, and the workers can conveniently weld the quartz boat fittings on the workbench 104 in all directions under the condition of keeping the original positions.
The auxiliary units 3 are symmetrically arranged on the center line of the base plate 106, and the first supporting plate 3054 and the second supporting plate 3062 are made of outer metal and inner silicone.
Claims (7)
1. The utility model provides a quartz boat shaping auxiliary assembly for solar cell silicon chip diffusion processing which characterized in that includes:
the supporting unit is used for carrying out work support on the quartz boat fittings;
the rotation control unit is used for adjusting the angle of the quartz boat fitting during welding and is arranged at the top of the supporting unit;
the auxiliary unit is used for adjusting and supporting the welding of the accessories and is arranged at the top of the rotary control unit:
the auxiliary unit comprises a first supporting plate and a second supporting plate, the first supporting plate and the second supporting plate are used for supporting the operation-welded arm, the tops of the first supporting plate and the second supporting plate are movably connected through groove columns and sleeves, the sleeves are connected through rotating arms and stand columns, and supporting units are fixedly arranged at the bottoms of the stand columns.
2. The quartz boat molding auxiliary equipment for solar cell silicon wafer diffusion processing according to claim 1,
a groove is formed in one end, far away from the sleeve, of each groove column, transverse columns penetrate through two sides of each groove, and inner connecting rods matched with the transverse column through holes are connected to the inner sides of the grooves;
the inner side of the groove is connected with an outer link rod matched with the cross column through hole.
3. The quartz boat molding auxiliary equipment for solar cell silicon wafer diffusion processing according to claim 2,
the outer connecting rods are symmetrically arranged along the center line of the groove column, the symmetrically arranged outer connecting rods are matched with the through holes of the folded plate through the cross columns, at least one group of telescopic rods are arranged at the top of the folded plate, elastic units are spirally wound on the outer surfaces of the telescopic rods, and one ends of the telescopic rods and the elastic units, which are far away from the folded plate, are elastically connected with first supporting plates;
the inner link rod is matched with the extending plate through holes symmetrically formed in the bottom of the supporting plate base through the cross column, and the groove surface of the supporting plate base is elastically connected with the second supporting plate through the elastic unit.
4. The quartz boat molding auxiliary equipment for solar cell silicon wafer diffusion processing according to any one of claims 1 to 3,
the supporting unit comprises a bottom groove, the surface of the supporting unit is provided with the bottom groove, the center of the bottom groove is provided with a rotating unit, and the top of the rotating unit is synchronously provided with a supporting rod;
the top welding of bracing piece has the workstation, the mounting groove has been seted up on the surface of workstation.
5. The quartz boat molding auxiliary equipment for solar cell silicon wafer diffusion processing according to claim 4,
the mounting grooves are arranged on the surface of the workbench in a crossed manner, and clamping blocks matched with the mounting grooves and used for placing quartz boat assembly accessories are arranged at the tops of the mounting grooves;
a base column is arranged on one side of the bottom groove, which is far away from the supporting rod, and a base plate is fixed at the top end of the base column.
6. The quartz boat molding auxiliary equipment for solar cell silicon wafer diffusion processing according to claim 4,
the rotation control unit comprises at least one group of rotating arms, and the rotating arms are fixedly connected with the supporting rod through the rotation control unit;
the rotating arm is in sliding fit with the bottom groove through a groove block arranged at the bottom of one side, far away from the supporting rod, of the rotating arm.
7. The quartz boat forming auxiliary device for solar cell silicon wafer diffusion processing as defined in claim 4,
the auxiliary unit is symmetrically arranged with the central line of the seat plate, and the first supporting plate and the second supporting plate are composed of outer side metal and inner side silica gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210519807.0A CN114890663B (en) | 2022-05-13 | 2022-05-13 | Quartz boat forming auxiliary equipment for solar cell silicon wafer diffusion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210519807.0A CN114890663B (en) | 2022-05-13 | 2022-05-13 | Quartz boat forming auxiliary equipment for solar cell silicon wafer diffusion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114890663A true CN114890663A (en) | 2022-08-12 |
| CN114890663B CN114890663B (en) | 2024-05-17 |
Family
ID=82720783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210519807.0A Active CN114890663B (en) | 2022-05-13 | 2022-05-13 | Quartz boat forming auxiliary equipment for solar cell silicon wafer diffusion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114890663B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020158492A1 (en) * | 2001-04-25 | 2002-10-31 | Kam Ko | Torso and forearm supporting device for chairs, workstands and the like |
| KR20140001346U (en) * | 2012-08-27 | 2014-03-07 | 주식회사 현대미포조선 | Stand for overhead welding |
| CN208083642U (en) * | 2018-03-23 | 2018-11-13 | 成都航空职业技术学院 | A kind of supporting rack for supporting arm when welding |
| CN111390442A (en) * | 2020-04-17 | 2020-07-10 | 南京信息职业技术学院 | Welding table for manual welding of electronic components |
| CN213373261U (en) * | 2020-07-16 | 2021-06-08 | 汪海丽 | Arm support frame for nursing |
| CN213641293U (en) * | 2020-10-17 | 2021-07-09 | 龙本柱 | Adjustable support for auxiliary hand support in ophthalmologic operation |
| KR20210136687A (en) * | 2020-05-08 | 2021-11-17 | 경북대학교 산학협력단 | Supporting apparatus for arm |
| CN216394626U (en) * | 2021-12-11 | 2022-04-29 | 王丽娟 | Be arranged in supplementary support frame of ophthalmic surgery hand |
-
2022
- 2022-05-13 CN CN202210519807.0A patent/CN114890663B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020158492A1 (en) * | 2001-04-25 | 2002-10-31 | Kam Ko | Torso and forearm supporting device for chairs, workstands and the like |
| KR20140001346U (en) * | 2012-08-27 | 2014-03-07 | 주식회사 현대미포조선 | Stand for overhead welding |
| CN208083642U (en) * | 2018-03-23 | 2018-11-13 | 成都航空职业技术学院 | A kind of supporting rack for supporting arm when welding |
| CN111390442A (en) * | 2020-04-17 | 2020-07-10 | 南京信息职业技术学院 | Welding table for manual welding of electronic components |
| KR20210136687A (en) * | 2020-05-08 | 2021-11-17 | 경북대학교 산학협력단 | Supporting apparatus for arm |
| CN213373261U (en) * | 2020-07-16 | 2021-06-08 | 汪海丽 | Arm support frame for nursing |
| CN213641293U (en) * | 2020-10-17 | 2021-07-09 | 龙本柱 | Adjustable support for auxiliary hand support in ophthalmologic operation |
| CN216394626U (en) * | 2021-12-11 | 2022-04-29 | 王丽娟 | Be arranged in supplementary support frame of ophthalmic surgery hand |
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| Publication number | Publication date |
|---|---|
| CN114890663B (en) | 2024-05-17 |
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