CN108121414A - For the device of fixed memory item - Google Patents
For the device of fixed memory item Download PDFInfo
- Publication number
- CN108121414A CN108121414A CN201711389441.5A CN201711389441A CN108121414A CN 108121414 A CN108121414 A CN 108121414A CN 201711389441 A CN201711389441 A CN 201711389441A CN 108121414 A CN108121414 A CN 108121414A
- Authority
- CN
- China
- Prior art keywords
- door
- latch
- slot
- strip
- memory bar
- 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
- 230000015654 memory Effects 0.000 title claims abstract description 94
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000013013 elastic material Substances 0.000 claims description 4
- 239000000428 dust Substances 0.000 abstract description 12
- 238000009825 accumulation Methods 0.000 abstract description 10
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000284 extract Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/18—Packaging or power distribution
- G06F1/183—Internal mounting support structures, e.g. for printed circuit boards, internal connecting means
- G06F1/185—Mounting of expansion boards
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/20—Cooling means
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Casings For Electric Apparatus (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The present patent application discloses a kind of device for fixed memory item, and including card column and slot, the both ends of slot are respectively arranged with buckle, and the both sides of slot are hinged with door；The upper end of two doors is equipped with the latch being mutually clamped, and latch is equipped with straight slot, and straight slot interior sealing slidably connects sliding block, and the lower section of latch is equipped with the air bag connected with straight slot；Latch is equipped with strip, and strip is inFont, lower end and the one end of latch away from place door of strip are fixed；Door both ends are equipped with snap-gauge, and card column is used for through strip and latch；Door is equipped with cavity, and support column is equipped in cavity, and support column is equipped with impeller；The bottom of cavity is equipped with filter plate, and the bottom of filter plate is equipped with breather cheek valve, and door is equipped with unidirectional air outlet valve.Compared with prior art, memory bar can be secured firmly in slot by the present apparatus, and ensured memory bar heat dissipation and avoided dust accumulation on memory bar, so as to ensure that computer system being capable of normal operation.
Description
Technical field
The invention belongs to field of computer technology, specifically disclose a kind of device for fixed memory item.
Background technology
Memory bar is that CPU can be by bus addressing, and carries out the machine element of read-write operation.Memory bar is gone through in computer
It was once the extension of main memory in history, with the requirement that computer soft and hardware technology is constantly updated, memory bar has become in read-write
The entirety deposited.The size of our usually said computer memories (RAM), that is, refer to the total capacity of memory bar, and memory bar is mounted on meter
In the host of calculation machine.Computer can generate heat in use, in order to ensure the use of computer, usually pacify in host
Loaded on radiator fan.
At present, memory bar is mainly the slot to be matched therewith by the golden finger insertion on memory bar；Use slot card simultaneously
The mode at the tight memory bar both ends of buckle installs fixation.Since the clamping force of slot and buckle is limited, the buckle of slot can not
Completely by memory bar clamping；Under the influence of being vibrated in host transport or operational process, memory bar is present with loosening or direct
The phenomenon that departing from slot, so as to affect the normal operation of computer system, big inconvenience is brought to the use of computer.And
Radiator fan since the air that radiator fan introduces contains dust, easily will make memory bar during long-term operation
Upper accumulation dust, causes memory bar hydraulic performance decline, can also influence the operation of computer.
The content of the invention
The purpose of the present invention is providing a kind of device for fixed memory item, to solve to fix after memory bar is inserted into slot
It is loosely easy to fall off, influence the problem of computer system is run.
In order to achieve the above object, base case of the invention is：For the device of fixed memory item, including card column and use
In the slot for plugging memory bar, the both ends of the slot are separately provided for the buckle at memory bar both ends described in clamping, described
The both sides of slot are hinged with door, and the cross section of the door is arc-shaped, and the diameter of door circular arc is more than the height of memory bar
Degree；The upper end of two doors is equipped with the latch being mutually clamped, and latch is equipped with straight slot, and straight slot interior sealing slidably connects cunning
Block, the lower section of latch are equipped with the air bag connected with straight slot；The latch is equipped with strip, and the strip is inFont, it is described
The lower end of strip is fixed with the one end of latch away from place door, the door direction where the upper end towards latch of strip；It is described
Door both ends are equipped with the snap-gauge for being tightly connected with buckle, and the card column is used for through strip and latch；The gear
It covers equipped with cavity, the cavity is interior to be equipped with support column, and the support column is equipped with impeller；The bottom of the cavity is equipped with filtering
Plate, the bottom of the filter plate are equipped with the breather cheek valve with being connected inside door, and door is equipped with unidirectional air outlet valve.
The operation principle of this base case is：Present apparatus installation memory bar can be used in a computer, memory bar can be made
While being secured firmly in computer, and so that the memory bar is radiated, the accumulation of dust is avoided.The present apparatus is in use, along gear
The hinged place of lid rotates door, and door is made to be opened along slot both sides, and the golden finger of memory bar is inserted into slot, and uses buckle
Clamping memory bar both ends.
Then rotate door be mutually clamped the latch of two doors, due to the door both ends be equipped with for buckle
The snap-gauge of sealed connection, the cross section of two doors are arc-shaped, and the diameter of door circular arc is more than the height of memory bar；Two gears
After the latch of lid is mutually clamped, memory bar can be made to be in the space that two doors surround.Since the latch is equipped with card
Item, the strip are inFont, lower end and the one end of latch away from place door of the strip are fixed, the upper end court of strip
To the door direction where latch；Strip on two doors, which will intersect, surrounds the port of a closing with latch, will
Card column is inserted into this port, can fix two door positions.Since latch is equipped with straight slot, straight slot interior sealing slidably connects
Sliding block, the lower section of latch are equipped with the air bag connected with straight slot；After card column is inserted between latch and strip, sliding block can be promoted along straight slot
Slide downward enters the air extrusion in straight slot in air bag, makes the lower section air bag volume increase of latch, you can make air bag to memory
The upper end of item pushes against.The upper end of memory bar is pushed against by air bag, the fixation to memory bar is on the one hand realized, if on the other hand main
Machine vibrates in operation or transportational process, and air bag has elasticity in itself, and memory bar is not damaged under the action of air bag.In door
Under the collective effect of air bag, memory bar is not in the situation of slot of directly coming off, after loosening occurs in memory bar, air bag
Memory bar can be pushed against again.
The present apparatus can carry out fan heat by the radiator fan installed in host, and be not in dust accumulation on memory bar
Situation.Since the door is equipped with cavity, support column is equipped in the cavity, the support column is equipped with impeller；It is described
The bottom of cavity is equipped with filter plate, and the bottom of the filter plate is equipped with the breather cheek valve with being connected inside door, is set on door
There is unidirectional air outlet valve；After radiator fan unlatching, it will be wheel rotation to impeller effect, wheel rotation extracts air out recessed
In chamber, air is entering through breather cheek valve in door after filter plate.Since two doors surround the space of sealing,
Air in door can flow out door from the second check valve, in the continuous running of impeller, there are air stream inside door, can make
Door can effectively radiate.Impurity dust is not present by filter plates in air into door, effectively air is avoided to accumulate
Onto memory bar, the use of computer is influenced.
The advantageous effect of this base case is：Memory bar is sealed in a space by the present apparatus by two doors,
It avoids on memory bar because radiator fan drives air constant flow accumulation dust.The present apparatus pushes against memory bar, a side by air bag
The fixation to memory bar is realized in face, on the other hand memory bar is avoided to be damaged.The present apparatus is by impeller, breather cheek valve and unidirectionally goes out
Air valve realizes that memory bar surrounding has air flow, so as to fulfill the heat dissipation of memory bar；And pass through filter plate into two
Air in door so as to avoid the dust accumulation on memory bar, avoids memory bar from influencing the use of computer.With the prior art
It compares, memory bar can be secured firmly in slot by the present apparatus, and ensured memory bar heat dissipation and avoided dust accumulation on memory bar,
So as to ensure that computer system being capable of normal operation.
Preferred embodiment one：Based on scheme it is preferred, the air bag be air bag made of non-elastic material, the sliding block
Upper end for inclined-plane, the door is the door that transparent plastic is made.Air bag made of non-elastic material is carried out to memory bar
During support, the air bag situation of rocking can weaken, so that memory bar is by better fixed support.The upper end of sliding block can be convenient for for inclined-plane
When card column is stretched between strip and latch, sliding block is pushed.The door that transparent plastic is made can be directly viewable the situation of memory bar,
And transparent plastic easy acquisition at low cost.
Preferred embodiment two：Based on scheme it is preferred, be equipped at latch in the door and be equipped with block, the block inclines
Tiltedly towards setting in the middle part of door.After memory bar is put into the present apparatus, block is in the both sides above memory bar, and air bag can be carried out
Stop, and then air bag is made preferably to be supported to memory bar.
Preferred embodiment three：Based on scheme it is preferred, the buckle is equipped with groove, and rubber is equipped in the groove
Pad, the snap-gauge are sticked in groove.Snap-gauge is connected by groove with snapping connection, and by rubber seal, in two gears
When the latch of lid fastens, snap-gauge is stretched into groove therewith, can also door be made to be fixed with snapped-in position.
Preferred embodiment four：Based on scheme it is preferred, the breather cheek valve and unidirectional air outlet valve are multiple.So that
The circulation situation of air is more preferably.
Preferred embodiment five：Based on scheme it is preferred, the card column both ends be equipped with card hole, it is described buckle both ends be hinged with
The hasp engaged with card hole.After card column is inserted between latch and strip, rotatable hasp is stretched into card hole, makes buckle and card column
Both ends are fixed, and further make both ends clamping of the buckle to inner side strip, so as to further be firmly fixed memory bar.
Description of the drawings
Fig. 1 is structure diagram of the present invention for the device embodiment of fixed memory item；
Fig. 2 is the structure sectional view at A-A in Fig. 1.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail：
Reference numeral in Figure of description includes：Slot 10, buckle 20, hasp 21, groove 22, door 30, latch 31,
Straight slot 32, sliding block 33, air bag 34, block 35, snap-gauge 36, strip 40, card column 41, card hole 42, cavity 50, support column 51, impeller
52nd, filter plate 53, breather cheek valve 60, unidirectional air outlet valve 61.
As shown in Figure 1 and Figure 2, for the device of fixed memory item, including card column 41 and for plugging inserting for memory bar
Slot 10, the both ends of slot 10 are separately provided for the buckle 20 at clamping memory bar both ends；The both sides of slot 10 are hinged with gear
Lid 30, the cross section of door 30 is arc-shaped, and the diameter of 30 circular arc of door is more than the height of memory bar；For the ease of checking memory
The situation of item, door 30 is made of transparent plastic in the present embodiment.The upper end of two doors 30 is provided with to be mutually clamped
Latch 31, straight slot 32 is provided on latch 31,32 interior sealing of straight slot to slidably connect sliding block 33, and the upper end of sliding block 33 is oblique
Face；The lower section of latch 31 is provided with the air bag 34 connected with straight slot 32, and air bag 34 is air bag 34 made of non-elastic material.Latch
Strip 40 is provided on 31, strip 40 is inFont, lower end and the one end of latch 31 away from place door 30 of strip 40 are consolidated
It is fixed, 30 direction of door where the upper end towards latch 31 of strip 40.30 both ends of door are provided with sealing with buckle 20
The snap-gauge 36 of connection is buckled on 20 there is provided groove 22, and groove 22 is interior to be provided with rubber pad, and snap-gauge 36 is sticked in groove 22.
Card column 41 is used for through strip 40 and latch 31, and 41 both ends of card column are provided with card hole 42, and 20 both ends of buckle are hinged with and block
The hasp 21 that hole 42 engages.It is provided in door 30 at latch 31 and is provided with block 35, block 35 is tilted towards 30 middle part of door
It sets.Cavity 50 is provided on door 30, support column 51 is provided in cavity 50, impeller 52 is provided on support column 51；Cavity
50 bottom is provided with filter plate 53, and the bottom of filter plate 53 is provided with the breather cheek valve 60 connected with 30 inside of door, gear
Unidirectional air outlet valve 61 is provided on lid 30.It preferably circulates, breather cheek valve 60 and unidirectionally goes out for the ease of air in door 30
Air valve 61 is multiple.
Present apparatus installation memory bar can be used in a computer, memory bar can be made to be secured firmly in computer, and make interior
While depositing item can radiate, the accumulation of dust is avoided.The present apparatus in use, along door 30 hinged place rotate door 30, make
Door 30 is opened along 10 both sides of slot, and the golden finger of memory bar is inserted into slot 10, and uses 20 clamping memory bars two of buckle
End.
Then two doors 30 are rotated, are mutually clamped the latch 31 of two doors 30, the snap-gauge 36 at 30 both ends of door can
In the groove 22 of insertion buckle 20, sealed under the action of rubber pad, so that memory bar is in what two doors 30 surrounded
In space.Due to being provided with strip 40 on latch 31, strip 40 is inFont, the lower end of strip 40 and latch 31 are away from institute
It is fixed in one end of door 30,30 direction of door where the upper end towards latch 31 of strip 40；Strip on two doors 30
40, which will intersect, surrounds the port of a closing with latch 31, and card column 41 is inserted into this port, can make two doors 30
Position is fixed.Due to being provided with straight slot 32 on latch 31,32 interior sealing of straight slot slidably connects sliding block 33, and the lower section of latch 31 is set
The air bag 34 connected with straight slot 32 is put；After card column 41 is inserted between latch 31 and strip 40, sliding block 33 can be promoted along straight slot 32
Slide downward enters the air extrusion in straight slot in air bag 34, increases 34 volume of lower section air bag of latch 31, you can to make air bag
The upper end of 34 pairs of memory bars pushes against.When the upper end of sliding block 33 can be stretched into convenient for card column 41 between strip 40 and latch 31 for inclined-plane,
Sliding block 33 is pushed.The upper end of memory bar is pushed against by air bag 34, the fixation to memory bar is on the one hand realized, if on the other hand
Host vibrates in operation or transportational process, and air bag 34 itself has elasticity, and memory bar is not damaged under the action of air bag 34.
Under the collective effect of door 30 and air bag 34, memory bar is not in the situation of slot 10 of directly coming off, and is occurred in memory bar
After loosening, air bag 34 also can push against memory bar again.Block 35 is in the both sides above memory bar, and air bag 34 can be hindered
Gear, and then air bag 34 is made preferably to be supported to memory bar.
After card column 41 is inserted between latch 31 and strip 40, rotatable hasp 21 is stretched into card hole 42, make buckle 20 with
41 both ends of card column are fixed, and further make the both ends clamping of 20 pairs of inner side strips of buckle, so as to further be firmly fixed memory bar.
The present apparatus can carry out fan heat by the radiator fan installed in host, and be not in the situation in dust accumulation to memory bar.
Due to being provided with cavity 50 on door 30, support column 51 is provided in cavity 50, impeller 52 is provided on support column 51；Cavity 50
Bottom be provided with filter plate 53, the bottom of filter plate 53 is provided with the breather cheek valve 60 connected with 30 inside of door, door
Unidirectional air outlet valve 61 is provided on 30；After radiator fan unlatching, it will it is that impeller 52 rotates to the effect of impeller 52, impeller 52
It rotates and extract air in cavity 50 out, air is entering through breather cheek valve 60 in door 30 after the filtering of filter plate 53.By
The space of sealing is surrounded in two doors 30, and the air in door 30 can flow out door 30 from the second check valve, in impeller 52
In continuous running, there are air stream inside door 30, door 30 can be enable effectively to radiate.Multiple breather cheek valves 60 and unidirectional
Air outlet valve 61 can make the circulation situation of air more preferably.Impurity dust is not present by the filtering of filter plate 53 in air into door 30,
It is effective that air accumulation is avoided to influence the use of computer to memory bar.
Above-described is only the embodiment of the present invention, and the common sense such as well known concrete structure and characteristic are not made herein in scheme
Excessive description.It, without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art
Several modifications and improvements are made, these should also be considered as protection scope of the present invention, these all do not interfere with what the present invention was implemented
Effect and practical applicability.
Claims (6)
1. for the device of fixed memory item, the slot including being used to plug memory bar, the both ends of the slot are respectively arranged with
For the buckle at memory bar both ends described in clamping, which is characterized in that further include card column, the both sides of the slot are hinged with gear
Lid, the cross section of the door is arc-shaped, and the diameter of door circular arc is more than the height of memory bar；The upper end of two doors is equipped with
For the latch being mutually clamped, latch is equipped with straight slot, and straight slot interior sealing slidably connects sliding block, and the lower section of latch is equipped with leading to
The air bag of slot connection；The latch is equipped with strip, and the strip is inFont, the lower end of the strip and latch are separate
One end of place door is fixed, the door direction where the upper end towards latch of strip；The door both ends be equipped with for
Be buckled the snap-gauge being tightly connected, and the card column is used for through strip and latch；The door is equipped with cavity, the cavity
Interior to be equipped with support column, the support column is equipped with impeller；The bottom of the cavity is equipped with filter plate, and the bottom of the filter plate is set
There is the breather cheek valve with being connected inside door, door is equipped with unidirectional air outlet valve.
2. the device of fixed memory item to be used for as described in claim 1, which is characterized in that the air bag is non-elastic material system
Into air bag, the upper end of the sliding block is inclined-plane, and the door is the door that transparent plastic is made.
3. the device of fixed memory item to be used for as described in claim 1, which is characterized in that be equipped at latch and set in the door
There is block, the block is tilted towards setting in the middle part of door.
4. the device of fixed memory item to be used for as described in claim 1, which is characterized in that the buckle is equipped with groove, institute
It states and rubber pad is equipped in groove, the snap-gauge is sticked in groove.
5. the device of fixed memory item to be used for as described in claim 1, which is characterized in that the breather cheek valve and unidirectionally go out
Air valve is multiple.
6. the device of fixed memory item is used for as described in claim 1, which is characterized in that the card column both ends are equipped with card hole,
The buckle both ends are hinged with the hasp engaged with card hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711389441.5A CN108121414B (en) | 2017-12-21 | 2017-12-21 | Device for fixed memory item |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711389441.5A CN108121414B (en) | 2017-12-21 | 2017-12-21 | Device for fixed memory item |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108121414A true CN108121414A (en) | 2018-06-05 |
| CN108121414B CN108121414B (en) | 2019-09-10 |
Family
ID=62230899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711389441.5A Active CN108121414B (en) | 2017-12-21 | 2017-12-21 | Device for fixed memory item |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108121414B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445533A (en) * | 2018-10-12 | 2019-03-08 | 莱芜职业技术学院 | A kind of memory bar mounting structure of automatic lifting sealing |
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| US20150246549A1 (en) * | 2014-02-28 | 2015-09-03 | Ricoh Company, Ltd. | Replaceable Ink Cartridge with Reusable Memory |
| CN206162300U (en) * | 2016-08-25 | 2017-05-10 | 重庆水利电力职业技术学院 | DRAM fixing device |
| CN206282203U (en) * | 2016-10-19 | 2017-06-27 | 济南大学 | A kind of computer memory bank low-coumption fastener |
| CN206451102U (en) * | 2017-02-23 | 2017-08-29 | 重庆工商职业学院 | Computer memory bank radiating fixation assembly |
| CN206703756U (en) * | 2017-05-03 | 2017-12-05 | 浙江维融电子科技股份有限公司 | A kind of print control instrument takes chapter equipment clamping and holding assembly |
| CN107453070A (en) * | 2017-08-16 | 2017-12-08 | 合肥宗平计算机科技有限公司 | The memory bank socket that anti-memory bar loosens |
| CN206757501U (en) * | 2017-05-19 | 2017-12-15 | 郑州云海信息技术有限公司 | A kind of server memory bar fixing device |
| CN206757638U (en) * | 2017-05-13 | 2017-12-15 | 深圳市奥赛尔精密制品有限公司 | A kind of magnetic stripe card holder device for electronic product |
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2017
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1702753A (en) * | 2004-05-24 | 2005-11-30 | 阿尔卑斯电气株式会社 | Recording medium mounting device |
| US20150246549A1 (en) * | 2014-02-28 | 2015-09-03 | Ricoh Company, Ltd. | Replaceable Ink Cartridge with Reusable Memory |
| CN206162300U (en) * | 2016-08-25 | 2017-05-10 | 重庆水利电力职业技术学院 | DRAM fixing device |
| CN206282203U (en) * | 2016-10-19 | 2017-06-27 | 济南大学 | A kind of computer memory bank low-coumption fastener |
| CN206451102U (en) * | 2017-02-23 | 2017-08-29 | 重庆工商职业学院 | Computer memory bank radiating fixation assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445533A (en) * | 2018-10-12 | 2019-03-08 | 莱芜职业技术学院 | A kind of memory bar mounting structure of automatic lifting sealing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108121414B (en) | 2019-09-10 |
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Effective date of registration: 20200602 Address after: No. 999, Wanshou Nan Road, South Street, Rugao City, Rugao, Jiangsu province (room 406, Rugao Hi-tech Zone 1) Patentee after: NANTONG YILIAN ENTERPRISE MANAGEMENT Co.,Ltd. Address before: 400000 No. 16-2 Yuchang Road, 18 Yuzhou Road, Jiulongpo District, Chongqing Patentee before: CHONGQING TIANJIE TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20240104 Address after: No. 301, Xingfu Hexi Road, Chengnan Street, Rugao City, Nantong City, Jiangsu Province, 226500 Patentee after: Nantong Yizhao Power Technology Co.,Ltd. Address before: 226500 No. 999 Wanshou South Road, Chengnan street, Rugao City, Nantong, Jiangsu (406, 1 building, Rugao hi tech Zone) Patentee before: NANTONG YILIAN ENTERPRISE MANAGEMENT Co.,Ltd. |
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