CN110325001A - A kind of EMI suppression shell mechanism for cabinet - Google Patents
A kind of EMI suppression shell mechanism for cabinet Download PDFInfo
- Publication number
- CN110325001A CN110325001A CN201910512392.2A CN201910512392A CN110325001A CN 110325001 A CN110325001 A CN 110325001A CN 201910512392 A CN201910512392 A CN 201910512392A CN 110325001 A CN110325001 A CN 110325001A
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- Prior art keywords
- slot
- shell
- plate
- piston
- emi suppression
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- 230000007246 mechanism Effects 0.000 title claims abstract description 34
- 230000001629 suppression Effects 0.000 title claims abstract description 28
- 238000003825 pressing Methods 0.000 claims abstract description 22
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000883990 Flabellum Species 0.000 description 1
- 241001233242 Lontra Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Casings For Electric Apparatus (AREA)
Abstract
The invention discloses a kind of EMI suppression shell mechanisms for cabinet, belong to abinet technical fields；A kind of EMI suppression shell mechanism for cabinet, including shell, para-seismic support is connected in shell, side plate is slidably connected on shell, side plate is equipped with the first through slot, clamping mechanism is connected in first through slot, clamping mechanism mainly has push rod, connecting rod, plunger shaft, clamp composition, push rod is slidably connected in the first through slot, the inner wall of connecting rod and the first through slot is rotatedly connected, first piston and second piston are slidably connected in plunger shaft, pressing plate is connected with above plunger shaft, first piston is fixedly linked with pressing plate, clamp is fixedly linked with second piston, small end is rotatedly connected with push rod, push rod lower end is connected with pressing plate, housing bottom inner wall is equipped with card slot corresponding with clamp；The present invention can be by installing anti-seismic structure in shell to improve the whole anti seismic efficiency of cabinet body, and both side plate can be dismantled, consequently facilitating dismantling to cabinet body.
Description
Technical field
The present invention relates to abinet technical fields more particularly to a kind of EMI suppression shell mechanisms for cabinet.
Background technique
Cabinet is usually the object for being used to store computer and related control device of cold-rolled steel sheet or alloy production, can be with
Protection to storage equipment is provided, electromagnetic interference is shielded, is arrange orderly and neatly equipment, it is convenient for later maintenance of equipment, cabinet one
As be used in network cabling room, floor wiring room, central machine room, data center computer room, control centre etc., cabinet is generally divided into server machine
Cabinet, network cabinet, console cabinet etc., existing control cabinet is since structure is more single, mostly integral structure, Wu Fabao
Card is easy to cause the work of electromagnetic wave influence control interior of equipment cabinet electric elements to extraneous shielding electromagnetic waves.
Through retrieving, such as Patent No.: CN201821304847.9, the day for announcing are as follows: 2019-03-08 discloses a kind of heat dissipation
Property good anti-electromagnetic interference control cabinet, including outside monolithic case, aluminium wire braiding plate, discharge pipe, metal otter board, motor
Shell, motor, flabellum, heat-dissipating casing, heat-dissipating pipe, hinge, electro-magnetic shielding cover, enters line row, metal knitted pipe, metal at base plate
Web plate, heat release hole, enters line shell and metal mesh opening pipe at cabinet door, its working principle is that: by the side in monolithic case be connected into
Line shell, and be fixedly connected in the side connection metal mesh opening pipe for entering line shell and in the inner cavity other side for entering line shell into line
Row and metal knitted pipe enter external world's electricity that control cabinet conducting wire is subject to by metal knitted pipe and metal mesh opening tube shield
While magnetic disturbance, it is also convenient for the classification into cable, consequently facilitating the cable of maintenance control cabinet.
In such as Patent No.: CN201520437903.6, the day for announcing are as follows: 2015-12-09 discloses a kind of Multi Role Aircraft
Cabinet, including oblong openings shell and it is set to the intracorporal installation panel of the shell, it further include being set to walking for the installation panel
Wire casing, a hinged glass cabinet door at shell nozzle；The shell is by aluminum alloy frame and is fixed on aluminum alloy frame
Several capillary heat sink compositions, its working principle is that: there is good heat dissipation performance in practical applications；Aluminium alloy is used simultaneously
The mode of framework composition also considerably increases anti-extrusion, the non-deformability of shell, and replacement also ten when there is local damage
It is convenient to divide, and totally enclosed structure also prevents dust and other impurities enter cabinet, and electronic communication in cabinet has been delayed to set significantly
The aging speed applied, and the utility model is pacifying power supply output precision, PLC control assembly, terminal assemblies and control assembly
Sectional type design on panel is filled, so that installation and removal are convenient, easy to operate and control, while easy to repair and replacement.
Two above documents, although wherein documents 1 solve the problems, such as electromagnetism interference, it is not easy to
Cabinet body is dismounted, and anti-seismic performance is bad, although being refined in documents 2 to dismounting, will not be can be carried out
Effectively prevent EMI from interfering, thus it is proposed that a kind of EMI suppression shell mechanism for cabinet come to there is currently deficiency come
It improves.
Summary of the invention
The purpose of the present invention is to solve deficiencies in the prior art, and outside a kind of EMI suppression for cabinet proposed
Shell structure.
To achieve the goals above, present invention employs following technical solutions:
A kind of EMI suppression shell mechanism for cabinet, including shell, are connected with para-seismic support in the shell, on the shell
Side plate is slidably connected, the side plate is equipped with the first through slot, is connected with clamping mechanism, the clamping machine in first through slot
Structure mainly has push rod, connecting rod, plunger shaft, clamp composition, and the push rod is slidably connected in the first through slot, the connecting rod and first
The inner wall of through slot is rotatedly connected, and first piston and second piston are slidably connected in the plunger shaft, is connected above the plunger shaft
Be connected to pressing plate, the first piston is fixedly linked with pressing plate, and the clamp is fixedly linked with second piston, the small end with
Push rod is rotatedly connected, and the push rod lower end is connected with pressing plate, and the housing bottom inner wall is equipped with card slot corresponding with clamp.
Preferably, the connecting rod lower end is rotatably connected to connector, and the connector is equipped with arc groove, the pressing plate
Top is connected with pin shaft, and the pin slide is connected in arc groove.
Preferably, the pressing plate bottom is connected with the first elastic part, the one end of first elastic part far from pressing plate and the
One through slot inner wall is connected.
Preferably, the piston cavity wall is connected with gas bleeder valve, the side plate outer wall be connected with it is corresponding with gas bleeder valve by
Button.
Preferably, the piston cavity wall is connected with block, and above the block that the first piston is located at, described second is living
Plug is located at below block, and the second elastic part is connected between the block and second piston.
Preferably, the side plate is equipped with the second through slot, and the push rod is slidably connected in the second through slot, on the push rod
It is fixedly connected with limit plate, the limit plate is slidably connected in the second through slot, between the limit plate and the second through slot inner wall
It is connected with third elastic part.
Preferably, the side plate is equipped with mounting groove, is connected with EMI metal plate in the mounting groove.
Preferably, the side plate is equipped with radiating groove, is connected with filter screen on the radiating groove.
Preferably, the para-seismic support is mainly made of top plate and bottom plate, multiple groups Hollow Pillar, and the Hollow Pillar is described
Hollow Pillar upper end is fixedly linked with top plate, and the Hollow Pillar lower end is fixedly linked with bottom plate, the top plate by bolt with
Shell is connected, and component placement plate is connected on the Hollow Pillar.
Preferably, the housing sidewall is rotatably connected to chamber door.
Compared with prior art, the present invention provides a kind of EMI suppression shell mechanisms for cabinet, have following beneficial to effect
Fruit:
1, para-seismic support, is mounted in shell by the EMI suppression shell mechanism for being used for cabinet first, can will specifically be pushed up by bolt
Plate is connected with shell, to realize positioning, can be played a supporting role by Hollow Pillar, after para-seismic support installs, by two
A side plate is connected to the both ends of shell by the sliding slot on shell, and while sliding side plate, the push rod on side plate takes the lead in and shell
The inner wall of body offsets, and then push rod slides in the first through slot, and then drives link rotatable, and then passes through connector band dynamic pressure plate
It moves down, and then drives first piston to slide in plunger shaft, and then second piston moves downward simultaneously, and then drive clamp
In the card slot of clamping housing bottom inner wall, the locking of side plate is realized, when needing to remove side plate, gas bleeder valve is opened by button,
And then plunger shaft is made to lose heart, second piston resets under the action of the second elastic part at this time, and first piston is the after pulling out side plate
One elastic part, which is realized, to be resetted, and the limit sheet reset on push rod can also be driven by third elastic part, and then connecting rod band dynamic pressure plate is multiple
Position, so that first piston be driven to reset, the button and gas bleeder valve in this programme are the prior art, are not belonging to create in this programme
New, the size of the card slot of push rod, clamp and housing bottom can be designed according in actual use, this device can pass through
Anti-seismic structure is installed in shell to improve the whole anti seismic efficiency of cabinet body, and both side plate can be dismantled, consequently facilitating
Cabinet body is dismantled.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram one of the EMI suppression shell mechanism for cabinet proposed by the present invention；
Fig. 2 is a kind of structural schematic diagram two of the EMI suppression shell mechanism for cabinet proposed by the present invention；
Fig. 3 is a kind of structural schematic diagram three of the EMI suppression shell mechanism for cabinet proposed by the present invention；
Fig. 4 is a kind of structural schematic diagram four of the EMI suppression shell mechanism for cabinet proposed by the present invention；
Fig. 5 is a kind of structural schematic diagram five of the EMI suppression shell mechanism for cabinet proposed by the present invention；
Fig. 6 is the structural schematic diagram of part A in a kind of EMI suppression shell mechanism Fig. 5 for cabinet proposed by the present invention；
Fig. 7 is the structural schematic diagram of part B in a kind of EMI suppression shell mechanism Fig. 6 for cabinet proposed by the present invention.
In figure: 1, shell；101, chamber door；2, side plate；201, EMI metal plate；202, radiating groove；3, top plate；301, bottom plate；
302, component placement plate；303, Hollow Pillar；4, the first through slot；401, push rod；402, connecting rod；403, arc groove；404,
Pressing plate；405, plunger shaft；406, first piston；407, second piston；408, clamp；409, gas bleeder valve；4091, button；410,
Second elastic part；411, the first elastic part；5, the second through slot；501, limit plate；502, third elastic part.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", "top",
The orientation or positional relationship of the instructions such as "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, merely to just
In description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with
Specific orientation construction and operation, therefore be not considered as limiting the invention.
Embodiment:
Referring to Fig.1-7, a kind of EMI suppression shell mechanism for cabinet, including shell 1 are connected with para-seismic support, shell in shell 1
Side plate 2 is slidably connected on body 1, side plate 2 is equipped with the first through slot 4, is connected with clamping mechanism, clamping mechanism in the first through slot 4
Mainly there are push rod 401, connecting rod 402, plunger shaft 405, clamp 408 form, and push rod 401 is slidably connected in the first through slot 4, connecting rod
402 are rotatedly connected with the inner wall of the first through slot 4, and first piston 406 and second piston 407 are slidably connected in plunger shaft 405, living
It is connected with pressing plate 404 above plug chamber 405, first piston 406 is fixedly linked with pressing plate 404, and clamp 408 and second piston 407 are solid
Fixed to be connected, 402 upper end of connecting rod is rotatedly connected with push rod 401, and 401 lower end of push rod is connected with pressing plate 404, and 1 bottom interior wall of shell is set
There is card slot corresponding with clamp 408.
402 lower end of connecting rod is rotatably connected to connector, and connector is equipped with arc groove 403, is connected at the top of pressing plate 404
Pin shaft, pin slide are connected in arc groove 403.
404 bottom of pressing plate is connected with the first elastic part 411, and the one end of the first elastic part 411 far from pressing plate 404 is logical with first
4 inner wall of slot is connected.
405 inner wall of plunger shaft is connected with gas bleeder valve 409, and 2 outer wall of side plate is connected with button corresponding with gas bleeder valve 409
4091。
405 inner wall of plunger shaft is connected with block, and above the block that first piston 406 is located at, second piston 407 is located at block
Lower section is connected with the second elastic part 410, plays to first piston 406 and second piston 407 between block and second piston 407
The effect of limit.
Side plate 2 is equipped with the second through slot 5, and push rod 401 is slidably connected in the second through slot 5, is fixedly connected on push rod 401
Limit plate 501, limit plate 501 are slidably connected in the second through slot 5, and is connected between 5 inner wall of limit plate 501 and the second through slot
Three elastic parts 502.
Side plate 2 is equipped with mounting groove, is connected with EMI metal plate 201 in mounting groove.
Side plate 2 is equipped with radiating groove 202, is connected with filter screen on radiating groove 202.
Para-seismic support is mainly made of top plate 3, bottom plate 301, multiple groups Hollow Pillar 303, Hollow Pillar 303, Hollow Pillar
303 upper ends are fixedly linked with top plate 3, and 303 lower end of Hollow Pillar is fixedly linked with bottom plate 301, and top plate 3 passes through bolt and shell 1
It is connected, component placement plate 302 is connected on Hollow Pillar 303.
1 side wall of shell is rotatably connected to chamber door 101.
Working principle: para-seismic support during installation, is mounted in shell 1 by user first, can specifically be incited somebody to action by bolt
Top plate 3 is connected with shell 1, to realize positioning, can be played a supporting role by Hollow Pillar 303, after para-seismic support installs,
At the both ends that two side plates 2 are connected to shell 1 by the sliding slot on shell 1, while sliding side plate 2, pushing away on side plate 2
Bar 401 takes the lead in offseting with the inner wall of shell 1, and then push rod 401 slides in the first through slot 4, and then connecting rod 402 is driven to rotate,
And then it is moved down by connector band dynamic pressure plate 404, and then first piston 406 is driven to slide in plunger shaft 405, Jin Er
Two pistons 407 move downward simultaneously, and then drive in the card slot of 408 clamping shell of clamp, 1 bottom interior wall, realize the lock of side plate 2
Tightly, when needing to remove side plate 2, gas bleeder valve 409 is opened by button 4091, and then plunger shaft 405 is made to lose heart, second is living at this time
Plug 407 resets under the action of the second elastic part 410, and first elastic part 411 after pulling out side plate 2 of first piston 406 is realized multiple
Position can also drive the limit plate 501 on push rod 401 to reset by third elastic part 502, and then connecting rod 402 is multiple with dynamic pressure plate 404
Position, so that first piston 406 be driven to reset, the button 4091 and gas bleeder valve 409 in this programme are the prior art, in this programme
In be not belonging to innovative point, the size of the card slot of 1 bottom of push rod 401, clamp 408 and shell can be set according in actual use
Meter, this device can improve the whole anti seismic efficiency of cabinet body, and both side plate 2 by installing anti-seismic structure in shell 1
It can be dismantled, consequently facilitating being dismantled to cabinet body.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of EMI suppression shell mechanism for cabinet, including shell (1), which is characterized in that be connected in the shell (1)
Para-seismic support slidably connects side plate (2) on the shell (1), and the side plate (2) is equipped with the first through slot (4), and described first
Clamping mechanism is connected in through slot (4), the clamping mechanism mainly has push rod (401), connecting rod (402), plunger shaft (405), card
Head (408) composition, the push rod (401) are slidably connected in the first through slot (4), the connecting rod (402) and the first through slot (4)
Inner wall is rotatedly connected, and slidably connects first piston (406) and second piston (407), the piston in the plunger shaft (405)
It is connected with pressing plate (404) above chamber (405), the first piston (406) is fixedly linked with pressing plate (404), the clamp (408)
It is fixedly linked with second piston (407), connecting rod (402) upper end is rotatedly connected with push rod (401), under the push rod (401)
End is connected with pressing plate (404), and shell (1) bottom interior wall is equipped with card slot corresponding with clamp (408).
2. a kind of EMI suppression shell mechanism for cabinet according to claim 1, which is characterized in that the connecting rod (402)
Lower end is rotatably connected to connector, and the connector is equipped with arc groove (403), is connected with pin at the top of the pressing plate (404)
Axis, the pin slide are connected in arc groove (403).
3. a kind of EMI suppression shell mechanism for cabinet according to claim 2, which is characterized in that the pressing plate (404)
Bottom is connected with the first elastic part (411), first elastic part (411) one end and the first through slot (4) far from pressing plate (404)
Inner wall is connected.
4. a kind of EMI suppression shell mechanism for cabinet according to claim 2, which is characterized in that the plunger shaft
(405) inner wall is connected with gas bleeder valve (409), and side plate (2) outer wall is connected with button corresponding with gas bleeder valve (409)
(4091).
5. a kind of EMI suppression shell mechanism for cabinet according to claim 4, which is characterized in that the plunger shaft
(405) inner wall is connected with block, and above the block that the first piston (406) is located at, the second piston (407) is located at block
Lower section is connected with the second elastic part (410) between the block and second piston (407).
6. a kind of EMI suppression shell mechanism for cabinet according to claim 3, which is characterized in that on the side plate (2)
Equipped with the second through slot (5), the push rod (401) is slidably connected in the second through slot (5), is fixedly connected on the push rod (401)
Have limit plate (501), the limit plate (501) is slidably connected in the second through slot (5), and the limit plate (501) is logical with second
Third elastic part (502) are connected between slot (5) inner wall.
7. a kind of EMI suppression shell mechanism for cabinet according to claim 1, which is characterized in that on the side plate (2)
Equipped with mounting groove, EMI metal plate (201) are connected in the mounting groove.
8. a kind of EMI suppression shell mechanism for cabinet according to claim 7, which is characterized in that on the side plate (2)
Equipped with radiating groove (202), filter screen is connected on the radiating groove (202).
9. a kind of EMI suppression shell mechanism for cabinet according to claim 1, which is characterized in that the para-seismic support
It is mainly made of top plate (3), bottom plate (301), multiple groups Hollow Pillar (303), the Hollow Pillar (303), the Hollow Pillar
(303) upper end is fixedly linked with top plate (3), and Hollow Pillar (303) lower end is fixedly linked with bottom plate (301), the top plate
(3) it is connected by bolt with shell (1), is connected with component placement plate (302) on the Hollow Pillar (303).
10. a kind of EMI suppression shell mechanism for cabinet according to claim 9, which is characterized in that the shell (1)
Side wall is rotatably connected to chamber door (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910512392.2A CN110325001B (en) | 2019-06-13 | 2019-06-13 | EMI-proof housing structure for cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910512392.2A CN110325001B (en) | 2019-06-13 | 2019-06-13 | EMI-proof housing structure for cabinet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110325001A true CN110325001A (en) | 2019-10-11 |
| CN110325001B CN110325001B (en) | 2024-08-16 |
Family
ID=68120961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910512392.2A Active CN110325001B (en) | 2019-06-13 | 2019-06-13 | EMI-proof housing structure for cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110325001B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110661185A (en) * | 2019-10-23 | 2020-01-07 | 徐州鑫贝克电力设备有限公司 | Power distribution cabinet convenient to mount and dismount |
| CN111031751A (en) * | 2019-12-06 | 2020-04-17 | 苏州浪潮智能科技有限公司 | Server heat dissipation cabinet, heat dissipation control system and method |
| CN112089996A (en) * | 2020-09-24 | 2020-12-18 | 安擎(天津)计算机有限公司 | Intelligent efficient server heat dissipation board room |
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| CN110661185A (en) * | 2019-10-23 | 2020-01-07 | 徐州鑫贝克电力设备有限公司 | Power distribution cabinet convenient to mount and dismount |
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| CN112089996B (en) * | 2020-09-24 | 2022-06-07 | 安擎(天津)计算机有限公司 | Intelligent server cooling board room |
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Country or region after: China Address after: No. 789 Shanhu West Road, Wujiang Economic and Technological Development Zone, Suzhou City, Jiangsu Province, 215299 Applicant after: Suzhou Hexin Precision Technology Co.,Ltd. Address before: 215200 No. 789, Shanhu West Road, Wujiang Economic and Technological Development Zone, Suzhou City, Jiangsu Province Applicant before: WELLTRUST PRECISION TECHNOLOGY (WUJIANG) Co.,Ltd. Country or region before: China |
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