CN106424996A - Overlapping type string welder - Google Patents
Overlapping type string welder Download PDFInfo
- Publication number
- CN106424996A CN106424996A CN201610964584.3A CN201610964584A CN106424996A CN 106424996 A CN106424996 A CN 106424996A CN 201610964584 A CN201610964584 A CN 201610964584A CN 106424996 A CN106424996 A CN 106424996A
- Authority
- CN
- China
- Prior art keywords
- lamination
- solder
- welding
- welding machine
- cell piece
- 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.)
- Granted
Links
- 238000003466 welding Methods 0.000 claims abstract description 66
- 229910000679 solder Inorganic materials 0.000 claims abstract description 64
- 238000007599 discharging Methods 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000003475 lamination Methods 0.000 claims description 59
- 238000001514 detection method Methods 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 3
- 210000000538 tail Anatomy 0.000 claims description 3
- 238000004026 adhesive bonding Methods 0.000 claims description 2
- 239000003463 adsorbent Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000011031 large-scale manufacturing process Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000006071 cream Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/002—Soldering by means of induction heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/005—Soldering by means of radiant energy
- B23K1/0056—Soldering by means of radiant energy soldering by means of beams, e.g. lasers, E.B.
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1804—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof comprising only elements of Group IV of the Periodic Table
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Optics & Photonics (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to an overlapping type string welder. The overlapping type string welder comprises a feeding device, a detecting device, a transportation adjusting device, a solder feeding device, an overlapping device and a welding device, wherein the feeding device, the detecting device, the transportation adjusting device, the solder feeding device, the overlapping device and the welding device are arranged along a conveying line; the solder feeding device is used for adding a conductive solder at one end of each cell; the overlapping device is used for overlapping the cells which are processed by the solder feeding device; the overlapping region of adjacent cells is capable of covering the conductive solder; the welding device is used for heating the conductive solder to form cell strings. The overlapping type string welder is capable of realizing an overall production process including welding and discharging of a single cell and tandem cell strings, is relatively high in production efficiency and is capable of satisfying the requirements of large-scale production.
Description
Technical field
The present invention relates to lamination series welding machine, belong to photovoltaic apparatus field.
Background technology
With the increasingly rise of photovoltaic module product, bring the fast development of the solar energy industry of China.With China
The constantly fast development of process industry is so that all obtain in photovoltaic component encapsulating, silicon chip processing and crystal-silicon solar cell manufacture
Obtained very big breakthrough and improvement.
Series welding machine is one of nucleus equipment in conventional photovoltaic module production process, and it is that single battery piece is passed through interconnection
Bar connects into the equipment of battery strings, and this conventional coupling arrangement can make leave space between cell piece and cell piece, simultaneously by
The part that interconnecting strip is blocked cannot receive sunlight, thus lead to whole conventional photovoltaic assembly area utilization relatively low, thus
Reduce the photoelectric transformation efficiency of photovoltaic module.Occur in that a kind of new imbrication photovoltaic module for this, it adopts imbrication technology former
Reason, the cell piece of traditional size is first cut into small pieces, then small pieces is rearranged, overlapping fixing with imbricated way, does not use
Interconnecting strip connects, and increased the power in assembly unit area.
For this new imbrication photovoltaic module, traditional series welding machine can not be suitable for new production technology, at present this
The welding production of kind of new imbrication photovoltaic module uses artificial lamination welding, production efficiency relatively low it is impossible to meet high-volume
The demand producing.
Content of the invention
It is an object of the invention to provide lamination series welding machine, its production efficiency is higher, disclosure satisfy that the need of production in enormous quantities
Ask.
The purpose of the present invention is to be achieved through the following technical solutions：
Lamination series welding machine, including the feeding device arranging along pipeline, detection means, carrying adjusting apparatus, upper solder apparatus, folds
Sheet devices, welder；
Upper solder apparatus are used for adding conductive solder in one end of cell piece；
Lamination device is used for the cell piece lapping that will process through upper solder apparatus, and the overlapping region of adjacent cell piece covers conduction
Solder；
Welder is used for heating conductive solder, forms battery strings.
Especially, upper solder apparatus include solder heads, and upper solder heads are arranged in solder mobile device, and upper solder moves
Dynamic device drives upper solder heads motion.
Especially, upper solder apparatus include multiple upper solder heads, for adding conductive solder on multiple cell pieces simultaneously.
Especially, conductive solder is respectively conductive paste, welding or conducting film.
Especially, upper solder heads are gluing head, clamping jaw device or adsorbent equipment.
Especially, lamination device includes multiple lamination heads, and lamination head is arranged in lamination robot, and lamination robot drives
Lamination head moves, and lamination head is provided with sucker, sucker independently controls.
Especially, carrying adjusting apparatus include multiple carrying heads, and carrying head is arranged on transfer robot, transfer robot
Drive carrying head motion, carrying head includes retractor device and sucker, and sucker is arranged on below retractor device, and sucker is independently controlled
System, for adjusting the cell piece that the past road conveying comes, is that rear road interpolation conductive solder is prepared.
Especially, welder adopts infrared welding, electromagnetic induction welding or laser welding.
Especially, welder adopts infrared welding, including infrared welding lamp box and cell piece press device, infrared welding
Temperature heating when lamp box is used for welding, cell piece press device includes silk or the bonding jumper of liftable motion, for pressing when welding
Piezoelectric battery piece.
Especially, lamination series welding machine also includes drawing mechanism, for the discharging carrying of battery strings.
Especially, lamination series welding machine also includes welding arrangement of busbars, and weldering arrangement of busbars is used for first of battery strings and electricity
Pond string cauda welding busbar.
Lamination series welding machine of the present invention, by the feeding device that arranges along pipeline, detection means, carrying adjustment dress
Put, upper solder apparatus, lamination device, welder, described upper solder apparatus be used for one end of cell piece add conductive solder,
Described lamination device is used for the cell piece lapping that will process through upper solder apparatus, and the overlapping region covering of adjacent cell piece is described
Conductive solder, described welder is used for heating described conductive solder, forms battery strings, it is achieved thereby that from monolithic battery piece to
The welding of bunchiness battery strings complete and discharging whole production process, this lamination series welding machine production efficiency is higher, disclosure satisfy that
The demand produced in enormous quantities.
Brief description
Fig. 1 is lamination series welding machine schematic diagram of the present invention；
Fig. 2 is the perspective view of the carrying adjusting apparatus of lamination series welding machine of the present invention；
Fig. 3 is the perspective view of the lamination head of lamination series welding machine of the present invention.
Specific embodiment
Below according to drawings and Examples, the present invention is described in further detail.
As shown in figure 1, the lamination series welding machine described in the embodiment of the present invention, include feeding device 3 along pipeline setting,
Detection positioner 4, carrying adjusting apparatus 2, upper solder apparatus 5, lamination device 6, welder 7；Upper solder apparatus 5 are used for
Coating conducting resinl and/or tin cream on the upper solder position of cell piece；Lamination device 6 is used for the electricity that will process through upper solder apparatus 5
Pond piece lapping, the overlapping region of adjacent cell piece covers upper solder position；Welder 7 heating welding cell piece is located at upper solder position
On conducting resinl and/or tin cream, formed battery strings；Drawing mechanism 8 is used for the discharging carrying of battery strings.
Feeding device 3 includes material loading adsorber, and material loading adsorber is arranged in feeding mobile device, the mobile dress of feeding
Put drive material loading adsorber lift, transverse motion；Material loading adsorber includes sucker and sucker installing rack, sucker installing rack
It is arranged on material loading lifting device, material loading lifting device adopts electric cylinders to drive, and material loading lifting device is arranged on feeding Traverse Displacement Unit
On, feeding Traverse Displacement Unit drives ball screw assembly, to drive by motor.
Feeding and conveying device, feeding and conveying device includes transmission belt, support and the belt wheel driving transmission belt.
Detection positioner 4 includes taking lens, detection light source, and detection positioner 4 can once complete multi-disc cell piece
Detection.
Upper solder apparatus 5 include solder heads, and upper solder heads are arranged in solder mobile device, upper solder mobile device
In drive, solder heads do transverse motion, and upper solder mobile device drives ball screw assembly, to drive using motor.
As shown in figure 3, lamination device 6 includes lamination head 1, lamination head 1 is arranged in lamination robot, lamination robot band
Fold head 1 lift, move, rotary motion.Lamination head 1 includes multiple adsorption heads 11, and the absorption of adsorption head 11 can with release
Individually control.Lamination head 1 includes lamination sucker 12, and lamination sucker 12 is arranged in sucker mobile device 13, sucker mobile device
13 is lift cylinder.
As shown in Fig. 2 carrying adjusting apparatus 2 include multiple carryings 22, carrying head is arranged on transfer robot 21, removes
Fortune robot 21 drives carrying 22 motion, carrying 22 is provided with sucker, sucker independently controls, for adjustment in the past
The cell piece that road conveying comes, is that rear road interpolation conductive solder is prepared.
Welder 7 includes infrared welding lamp box, lamp box mobile device, silk screen hold down gag, and infrared welding lamp box is installed
In lamp box mobile device, by the way of lamp box mobile device drives ball screw assembly, using motor, silk screen hold down gag includes silk
Net, silk screen is located on the downside of screen frame, and equipped with elastic device on screen frame, elastic device includes lead, and lead is set with spring,
Lead is inserted in sleeve, and spring abuts sleeve.During welding, lamp box driving means drive and are pressed in screen frame under infrared welding lamp box
On, elastic device compresses, and screen frame declines, and cell piece pushed down by silk screen, and after the completion of welding, infrared welding lamp box rises, and screen frame is in bullet
Resilience in the presence of property device.
This lamination series welding machine also includes drawing mechanism 8, and drawing mechanism 8 includes discharging sucker, and discharging sucker is arranged on sucker
On installing rack, sucker installing rack is arranged in discharging mobile device, and discharging mobile device includes discharging whirligig, and sucker is installed
Frame is arranged on discharging whirligig, and discharging whirligig is arranged on discharging Traverse Displacement Unit, and discharging Traverse Displacement Unit is arranged on out
On material lowering or hoisting gear, discharging lowering or hoisting gear adopts discharging lift cylinder to drive.
Lamination series welding machine also includes welding arrangement of busbars, welds busbar for first to battery strings with battery strings cauda,
Before weldering arrangement of busbars may also be arranged on drawing mechanism 8 after being arranged on solder apparatus 5.
This lamination series welding machine also includes conveying device, and conveying device is used for lamination device 6 lapping cell piece, and by after lapping
Cell piece backward convey welding and welding after the completion of discharging conveying, described conveying device adopt roll support Belt Conveying
Mode.
These are only explanation embodiments of the present invention, be not limited to the present invention, for those skilled in the art
For, all any modification, equivalent substitution and improvement within the spirit and principles in the present invention, made etc., should be included in this
Within bright protection domain.
Claims (11)
1. lamination series welding machine is it is characterised in that include the feeding device along pipeline setting, detection positioner, carrying adjustment
Device, upper solder apparatus, lamination device, welder；
Described upper solder apparatus are used for adding conductive solder in one end of cell piece；
Described lamination device is used for the cell piece lapping that will process through upper solder apparatus, and the overlapping region of adjacent cell piece covers
Described conductive solder；
Described welder is used for heating described conductive solder, forms battery strings.
2. lamination series welding machine as claimed in claim 1 is it is characterised in that described upper solder apparatus include solder heads, described
Upper solder heads are arranged in solder mobile device, and described upper solder mobile device drives described upper solder heads motion.
3. lamination series welding machine as claimed in claim 2 is it is characterised in that described upper solder apparatus include multiple upper solder heads,
For described conductive solder is added on multiple cell pieces simultaneously.
4. lamination series welding machine as claimed in claim 3 it is characterised in that described conductive solder be respectively conductive paste, welding or
Conducting film.
5. lamination series welding machine as claimed in claim 4 it is characterised in that described upper solder heads be gluing head, clamping jaw device or
Adsorbent equipment.
6. lamination series welding machine as claimed in claim 1 is it is characterised in that described lamination device includes multiple lamination heads, described
Lamination head is arranged in lamination robot, and described lamination robot drives described lamination head motion, and described lamination head is provided with
Sucker, described sucker independently controls.
7. right wants the lamination series welding machine as described in 6 it is characterised in that described carrying adjusting apparatus include multiple carrying heads, institute
State carrying head to be arranged on transfer robot, described transfer robot drives described carrying head motion, described carrying head includes institute
State retractor device and described sucker, described sucker is arranged on below described retractor device, and described sucker independently controls, and is used for
The cell piece that the conveying of adjustment the past road comes, is that the described conductive solder of rear road interpolation is prepared.
8. lamination series welding machine as claimed in claim 1 is it is characterised in that described welder adopts infrared welding, electromagnetism sense
Should weld or laser welding.
9. lamination series welding machine as claimed in claim 8 is it is characterised in that described welder adopts infrared welding, including red
External welding lamp box and cell piece press device, temperature heating when described infrared welding lamp box is used for welding, described cell piece pressing
Device includes silk or the bonding jumper of liftable motion, for pressing cell piece when welding.
10. lamination series welding machine as claimed in claim 9 is it is characterised in that also include drawing mechanism, for the discharging of battery strings
Carrying.
11. lamination series welding machines as claimed in claim 10 are it is characterised in that also include welding arrangement of busbars, described weldering is confluxed
Strip device is used for welding busbar to first of battery strings and battery strings cauda.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610964584.3A CN106424996B (en) | 2016-10-28 | 2016-10-28 | Laminated series welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610964584.3A CN106424996B (en) | 2016-10-28 | 2016-10-28 | Laminated series welding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106424996A true CN106424996A (en) | 2017-02-22 |
| CN106424996B CN106424996B (en) | 2019-12-17 |
Family
ID=58180413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610964584.3A Active CN106424996B (en) | 2016-10-28 | 2016-10-28 | Laminated series welding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106424996B (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106862788A (en) * | 2017-04-15 | 2017-06-20 | 无锡奥特维科技股份有限公司 | Busbar welding method and series welding system |
| CN107199383A (en) * | 2017-07-20 | 2017-09-26 | 常州天合光能有限公司 | A kind of welding method of photovoltaic string welding machine and battery strings |
| CN107256908A (en) * | 2017-06-26 | 2017-10-17 | 中节能太阳能科技（镇江）有限公司 | The battery strings array continuous production technology and its production equipment of solar components |
| CN107452836A (en) * | 2017-07-31 | 2017-12-08 | 无锡先导智能装备股份有限公司 | The drop glue lamination device and drop glue laminating method of a kind of cell piece |
| CN107931879A (en) * | 2017-12-19 | 2018-04-20 | 无锡奥特维科技股份有限公司 | Lamination welding equipment and lamination welding method |
| CN108127278A (en) * | 2017-12-20 | 2018-06-08 | 无锡奥特维科技股份有限公司 | Busbar laminating method |
| CN108461574A (en) * | 2018-01-23 | 2018-08-28 | 无锡奥特维科技股份有限公司 | Cell piece stack device and method |
| CN108766914A (en) * | 2018-06-19 | 2018-11-06 | 无锡奥特维科技股份有限公司 | Lamination device and string welding machine |
| CN109702367A (en) * | 2019-01-31 | 2019-05-03 | 无锡先导智能装备股份有限公司 | Multiple-grid string welding machine |
| CN110010726A (en) * | 2019-04-29 | 2019-07-12 | 无锡奥特维科技股份有限公司 | Cell piece lamination handling device |
| CN111230253A (en) * | 2020-03-21 | 2020-06-05 | 杭州德泰克医疗器材有限公司 | Production equipment for orthodontic buccal tube |
| CN113690343A (en) * | 2021-08-25 | 2021-11-23 | 保定中泰新能源科技有限公司 | Solar wafer stringer |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106862788A (en) * | 2017-04-15 | 2017-06-20 | 无锡奥特维科技股份有限公司 | Busbar welding method and series welding system |
| CN107256908A (en) * | 2017-06-26 | 2017-10-17 | 中节能太阳能科技（镇江）有限公司 | The battery strings array continuous production technology and its production equipment of solar components |
| CN107256908B (en) * | 2017-06-26 | 2024-02-02 | 中节能太阳能科技（镇江）有限公司 | Continuous production process and production equipment for battery string array of solar module |
| CN107199383A (en) * | 2017-07-20 | 2017-09-26 | 常州天合光能有限公司 | A kind of welding method of photovoltaic string welding machine and battery strings |
| CN107452836B (en) * | 2017-07-31 | 2023-10-20 | 无锡先导智能装备股份有限公司 | Glue-dropping lamination device and glue-dropping lamination method for battery piece |
| CN107452836A (en) * | 2017-07-31 | 2017-12-08 | 无锡先导智能装备股份有限公司 | The drop glue lamination device and drop glue laminating method of a kind of cell piece |
| CN107931879A (en) * | 2017-12-19 | 2018-04-20 | 无锡奥特维科技股份有限公司 | Lamination welding equipment and lamination welding method |
| CN108127278A (en) * | 2017-12-20 | 2018-06-08 | 无锡奥特维科技股份有限公司 | Busbar laminating method |
| CN108127278B (en) * | 2017-12-20 | 2020-07-17 | 无锡奥特维科技股份有限公司 | Bus bar lamination method |
| CN108461574A (en) * | 2018-01-23 | 2018-08-28 | 无锡奥特维科技股份有限公司 | Cell piece stack device and method |
| CN108766914A (en) * | 2018-06-19 | 2018-11-06 | 无锡奥特维科技股份有限公司 | Lamination device and string welding machine |
| CN108766914B (en) * | 2018-06-19 | 2024-02-27 | 无锡奥特维科技股份有限公司 | Lamination device and series welding machine |
| CN109702367A (en) * | 2019-01-31 | 2019-05-03 | 无锡先导智能装备股份有限公司 | Multiple-grid string welding machine |
| CN110010726A (en) * | 2019-04-29 | 2019-07-12 | 无锡奥特维科技股份有限公司 | Cell piece lamination handling device |
| CN110010726B (en) * | 2019-04-29 | 2024-03-01 | 无锡奥特维科技股份有限公司 | Battery piece lamination handling device |
| CN111230253B (en) * | 2020-03-21 | 2021-06-15 | 杭州德泰克医疗器材有限公司 | Production equipment for orthodontic buccal tube |
| CN111230253A (en) * | 2020-03-21 | 2020-06-05 | 杭州德泰克医疗器材有限公司 | Production equipment for orthodontic buccal tube |
| CN113690343A (en) * | 2021-08-25 | 2021-11-23 | 保定中泰新能源科技有限公司 | Solar wafer stringer |
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| CN106424996B (en) | 2019-12-17 |
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