CN113738637A - Pipeline limiting device of high-pressure constant-flow pump pipe for liquid chromatography - Google Patents
Pipeline limiting device of high-pressure constant-flow pump pipe for liquid chromatography Download PDFInfo
- Publication number
- CN113738637A CN113738637A CN202111024074.5A CN202111024074A CN113738637A CN 113738637 A CN113738637 A CN 113738637A CN 202111024074 A CN202111024074 A CN 202111024074A CN 113738637 A CN113738637 A CN 113738637A
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- Prior art keywords
- fixedly connected
- fixed
- pressure constant
- pipeline
- liquid chromatography
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- 238000004811 liquid chromatography Methods 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000004816 latex Substances 0.000 description 6
- 229920000126 latex Polymers 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000005526 G1 to G0 transition Effects 0.000 description 3
- 229920000271 Kevlar® Polymers 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000004761 kevlar Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000004587 chromatography analysis Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 210000000003 hoof Anatomy 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004816 paper chromatography Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000004809 thin layer chromatography Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/22—Arrangements for enabling ready assembly or disassembly
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pipeline Systems (AREA)
- Supports For Pipes And Cables (AREA)
Abstract
The invention discloses a pipeline limiting device of a high-pressure constant-current pump pipe for liquid chromatography, which comprises two outer fixing frames and a connecting shaft, wherein an electromagnetic controller is fixedly connected to one side of the bottom of an inner cavity of each outer fixing frame, a fixing shell is fixedly connected to the top of the electromagnetic controller, the top of the fixing shell is fixedly connected with the surface of the outer fixing frame, electromagnetic plates are fixedly connected to the top and the bottom of the inner cavity of the fixing shell and between the top and the bottom of the inner cavity of the fixing shell, threaded holes are formed in the top and the bottom of the two sides of the surface of the electromagnetic plates, and a movable block is connected between the two electromagnetic plates in a sliding manner. This pipeline stop device of high pressure constant current pump line for liquid chromatogram adopts the mode of soft protection, comes to carry out spacing fixed to the pipeline to realize going on when protection and spacing fixed, let the pipeline can reduce its consumption when long-time use and frequent dismantlement, thereby reach the purpose of protection.
Description
Technical Field
The invention relates to the technical field of high-pressure constant-flow pump pipes, in particular to a pipeline limiting device of a high-pressure constant-flow pump pipe for liquid chromatography.
Background
Phase chromatography is a separation and analysis technique characterized by the use of liquid as the mobile phase and the stationary phase in various forms, such as paper, sheet and packed bed. In the process of developing chromatographic techniques, in order to distinguish various methods, respective names are made according to the forms of stationary phases, such as paper chromatography, thin layer chromatography and column liquid chromatography, the mobile phase of the classical liquid chromatography slowly flows through a chromatographic column by means of gravity, so that the particle size of the stationary phase cannot be too small (about 100 μm-150 μm), and the separated samples are collected by stages and then analyzed, so that the classical liquid chromatography not only has low separation efficiency and slow analysis speed, but also has relatively complex operation until the 20 th century and 60 th generation.
The pipeline stop device of current high pressure constant current pump pipe for liquid chromatogram, spacing and fixed effect are not good enough, and the pipeline size and the kind of high pressure constant current pump pipe are different moreover, and the application scope that does not possess the stop device of size regulatory function like this will reduce by a wide margin, is exactly the prior art center in addition, does not carry out the corresponding equipment of soft protection to the pipeline, in long-time spacing fixed, can injure the pipeline body to be unfavorable for people to use.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a pipeline limiting device of a high-pressure constant-flow pump pipe for liquid chromatography, which solves the problems in the background technology.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a pipeline limiting device of a high-pressure constant-flow pump pipe for liquid chromatography comprises two external fixing frames and a connecting shaft, wherein the two external fixing frames are fixedly connected through the connecting shaft, one side of the bottom of an inner cavity of each external fixing frame is fixedly connected with an electromagnetic controller, the top of the electromagnetic controller is fixedly connected with a fixed shell, the top of the fixed shell is fixedly connected with the surface of the external fixed frame, electromagnetic plates are fixedly connected between the top and the bottom of the two sides of the inner cavity of the fixed shell, the top and the bottom of the two sides of the surface of the electromagnetic plate are both provided with threaded holes, a movable block is connected between the two electromagnetic plates in a sliding way, one side of the movable block is fixedly connected with a fixed seat, the surface of the movable block is provided with a through hole matched with the threaded hole, and the fixed surface of one side is connected with the arc connecting seat between two fixing bases, the top and the bottom of arc connecting seat all fixedly connected with elastic connection piece.
Preferably, the surface of the outer fixing frame and the side close to the connecting shaft are penetrated with threaded parts, mounting holes are formed in the top and the bottom of the surfaces of the two threaded parts of the inner cavity, and the inner cavities of the two mounting holes are in threaded connection with limiting rods.
Preferably, two the arc connecting seat all is through elastic connection piece difference first guard plate of fixedly connected with and second guard plate to the equal fixedly connected with extrusion pad in middle part and one side of first guard plate and second guard plate of arc connecting seat one side.
Preferably, the mounting groove has been seted up at the top of first guard plate surface one side to the axis of rotation has been run through at the middle part between mounting groove inner chamber front and the back, spacing hole has all been seted up at the both sides and the top on the outside positive surface of axis of rotation, the left side and the bottom of axis of rotation and the fixed surface connection who is located first guard plate have a fixed knot.
Preferably, the left side fixedly connected with switching hasp between installation groove inner chamber front and the back to the standing groove has been seted up on the surface at second guard plate top, the movable shaft has been run through in the left side between standing groove inner chamber front and the back.
Preferably, the outer surface winding fixedly connected with fixed band of axis of rotation to one side of fixed band encircles loose axle and switching hasp in proper order, the middle part fixedly connected with fixed strip on fixed band right side.
Preferably, the right side of the surface of the fixed strip is movably connected with the bottom of the inner cavity of the placing groove through a connecting bolt, and mounting holes are formed in two sides of the surface of the fixed strip.
Preferably, one side of the top and the bottom of the external fixing frame is provided with a fixing hole, and an inner cavity of the fixing hole is in threaded connection with a limiting shaft.
(III) advantageous effects
The invention provides a pipeline limiting device of a high-pressure constant-flow pump pipe for liquid chromatography. The method has the following beneficial effects:
(1) this pipeline stop device of high pressure constant current pump pipe for liquid chromatogram adopts the mode of soft protection, comes to carry out spacing fixed to the pipeline to go on when realizing protection and spacing fixed, let the pipeline can reduce its consumption when long-time use and frequent dismantlement, thereby reach the purpose of protection.
(2) This pipeline stop device of high pressure constant current pump pipe for liquid chromatogram uses the fixed subassembly of adjustability, lets pipeline more convenient when carrying out spacing installation, can be convenient carry out the size of spacing fixed pipeline to adjust and change according to needs, realizes the effect that the large tracts of land is suitable for.
(3) This pipeline stop device of high pressure constant current pump pipe for liquid chromatogram can let people more convenient when the angle of adjustment pipeline, can take the try method, tries after confirming a position, and the adjusting position is very convenient in the try, need not to fix spacing subassembly in the try, treats to confirm after corresponding position, fixes it using fixed subassembly, and it is more convenient that lets staff's installation work become.
(4) This pipeline stop device of high pressure constant current pump pipe for liquid chromatogram adopts reinforced structure many times, makes stop device holistic bearing capacity stronger, and the resistance of self is stronger, also can be more firm and stable, realizes optimizing operational environment's problem.
Drawings
FIG. 1 is a front view of the structure of the present invention;
FIG. 2 is a schematic view of a fastening strip construction of the present invention;
FIG. 3 is a schematic view of the structure of the fixing strip of the present invention;
FIG. 4 is a schematic view of a stationary housing structure according to the present invention;
FIG. 5 is a cross-sectional view of a stationary housing structure of the present invention;
fig. 6 is a partial enlarged view of the structure of fig. 2 according to the present invention.
In the figure, 1-an external fixing frame, 2-a connecting shaft, 3-an electromagnetic controller, 4-a fixing shell, 5-an electromagnetic plate, 6-a threaded hole, 7-a movable block, 8-a fixing seat, 9-a through hole, 10-an arc-shaped connecting seat, 11-an elastic connecting block, 12-a threaded part, 13-a limiting rod, 14-a first protecting plate, 15-a second protecting plate, 16-a rotating shaft, 17-a limiting hole, 18-a fixing buckle, 19-a switching lock catch, 20-a movable shaft, 21-a fixing belt, 22-a fixing strip, 23-a connecting bolt and 24-a limiting shaft.
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.
Referring to fig. 1-6, an embodiment of the present invention provides a technical solution: a pipeline limiting device of a high-pressure constant-current pump pipe for liquid chromatography comprises two external fixing frames 1 and a connecting shaft 2, wherein the two external fixing frames 1 are fixedly connected through the connecting shaft 2, one side of the bottom of an inner cavity of the external fixing frame 1 is fixedly connected with an electromagnetic controller 3, the top of the electromagnetic controller 3 is fixedly connected with a fixed shell 4, the top of the fixed shell 4 is fixedly connected with the surface of the external fixing frame 1, the top and the bottom of the two sides of the inner cavity of the fixed shell 4 are fixedly connected with electromagnetic plates 5, the top and the bottom of the two sides of the surface of the electromagnetic plates 5 are respectively provided with a threaded hole 6, a movable block 7 is connected between the two electromagnetic plates 5 in a sliding manner, one side of the movable block 7 is fixedly connected with a fixed seat 8, the surface of the movable block 7 is provided with a through hole 9 matched with the threaded hole 6, and the surface of one side between the two fixed seats 8 is fixedly connected with an arc-shaped connecting seat 10, the top and the bottom of the arc-shaped connecting seat 10 are fixedly connected with elastic connecting blocks 11, the electromagnetic plate 5 is an electromagnet, the electromagnet is a device for generating electromagnetism by electrifying, a conductive winding matched with the power of the iron core is wound outside the iron core, the coil which is electrified with current has magnetism like a magnet, the coil is also called the electromagnet, the electromagnet is usually made into a strip shape or a hoof shape so that the iron core is easier to magnetize, in addition, in order to enable the electromagnet to be demagnetized immediately after power failure, the electromagnet is usually made of soft iron or silicon steel materials which are demagnetized quickly when being electrified, the magnetism disappears after the power failure, the electromagnet is widely applied in daily life of people, and the power of a generator is greatly improved due to the invention of the electromagnet.
In the invention, a threaded part 12 penetrates through one side of the surface of the external fixing frame 1 close to the connecting shaft 2, mounting holes are formed in the top and the bottom of the surfaces of the two threaded parts 12 in the inner cavity, and the inner cavities of the two mounting holes are in threaded connection with a limiting rod 13.
In the invention, the two arc-shaped connecting seats 10 are respectively and fixedly connected with a first protection plate 14 and a second protection plate 15 through the elastic connecting blocks 11, and the middle part of one side of each arc-shaped connecting seat 10 and one side of each first protection plate 14 and one side of each second protection plate 15 are respectively and fixedly connected with an extrusion pad.
In the invention, the top of one side of the surface of the first protection plate 14 is provided with a mounting groove, a rotating shaft 16 penetrates through the middle part between the front surface and the back part of the inner cavity of the mounting groove, two sides and the top of the front surface outside the rotating shaft 16 are provided with limiting holes 17, and the left side and the bottom of the rotating shaft 16 and the surface of the first protection plate 14 are fixedly connected with fixing buckles 18.
In the invention, the switching lock catch 19 is fixedly connected to the left side between the front side and the back side of the inner cavity of the mounting groove, the surface of the top of the second protection plate 15 is provided with a placing groove, and the movable shaft 20 penetrates through the left side between the front side and the back side of the inner cavity of the placing groove.
In the present invention, a fixing band 21 is wound around the outer surface of the rotating shaft 16 and fixedly connected, one side of the fixing band 21 sequentially surrounds the movable shaft 20 and the adaptor lock 19, a fixing strip 22 is fixedly connected to the middle portion of the right side of the fixing band 21, the fixing band 21 is made of a kevlar intermediate layer, latex layers are coated on both sides of the fixing band, latex (latex) generally refers to a colloidal emulsion formed by dispersing polymer particles in water, and conventionally, an aqueous dispersion of rubber particles is referred to as latex, and an aqueous dispersion of resin particles is referred to as emulsion. The latex product is a product made of latex as a raw material, and Kevlar is a material which has low density, high strength, good toughness, high temperature resistance and easy processing and forming, the strength of the product is 5 times of that of steel with the same mass, but the density of the product is only one fifth of that of the steel (the Kevlar density is 1.44 grams per cubic centimeter, and the steel density is 7.859 grams per cubic centimeter).
In the invention, the right side of the surface of the fixed strip 22 is movably connected with the bottom of the inner cavity of the placing groove through the connecting bolt 23, and the two sides of the surface of the fixed strip 22 are both provided with mounting holes.
In the invention, fixing holes are arranged at one side of the top and the bottom of the external fixing frame 1, and the inner cavity of each fixing hole is in threaded connection with a limit shaft 24.
When the device is used, the connecting bolt 23 is firstly screwed off, the fixing strip 22 and the fixing strip 21 are taken down, then the whole device is moved until the arc-shaped connecting seat 10 is arranged at two sides of a pipeline, then the electromagnetic controller 3 is started, the electromagnetic plate 5 is electrified to generate magnetic force, the movable block 7 is adsorbed, the arc-shaped connecting seat 10 is moved to adjust the position until the device is completely suitable for the pipeline, at the moment, a high-pressure constant-flow pump is operated in an trial mode firstly, whether the position of the pipeline is accordant is detected, after the pipeline is detected to be completely accordant, the threaded hole 6 is fixed by a copper screw until the threaded hole is completely fixed with the movable block 7, then the electromagnetic controller 3 is closed, then the fixing strip 21 is pulled out, after the fixing strip 21 is pulled out for a proper distance, the fixing strip penetrates through the limiting hole 17 and then is clamped with the fixing buckle 18 to limit and fix the rotating shaft 16, then the fixing strip 21 is wound on the outer surface of the fixing strip 20 by traction, and then the first protection plate 14 is pulled back, pull to this one side of second guard plate 15 again after passing switching hasp 19's switching, paste the bonding through the magic that sets up in advance between the fixed band 21, then fixed strip 22 passes through connecting bolt 23 to be fixed on the surface of second guard plate 15, it is spacing to carry out soft protection to the pipeline through fixed band 21, then consolidate the both sides that insert external fixation frame 1 with spacing axle 24, twist external fixation frame 1 with screw 12 simultaneously in, run through two screw 12 through gag lever post 13 and carry out the secondary reinforcement, just so accomplish the installation, can use.
Claims (8)
1. The utility model provides a pipeline stop device of high pressure constant current pump line for liquid chromatogram, includes two external fixation framves (1) and connecting axle (2), two through connecting axle (2) fixed connection, its characterized in that between external fixation frame (1): one side of the bottom of the inner cavity of the outer fixing frame (1) is fixedly connected with an electromagnetic controller (3), the top of the electromagnetic controller (3) is fixedly connected with a fixed shell (4), the top of the fixed shell (4) is fixedly connected with the surface of the external fixed frame (1), the top and the bottom of the two sides of the inner cavity of the fixed shell (4) are fixedly connected with electromagnetic plates (5) between the top and the bottom, threaded holes (6) are respectively formed in the top and the bottom of the two sides of the surface of the electromagnetic plate (5), a movable block (7) is connected between the two electromagnetic plates (5) in a sliding manner, a fixed seat (8) is fixedly connected with one side of the movable block (7), a through hole (9) matched with the threaded hole (6) is formed in the surface of the movable block (7), and the surface of one side between the two fixed seats (8) is fixedly connected with an arc-shaped connecting seat (10), the top and the bottom of the arc-shaped connecting seat (10) are fixedly connected with elastic connecting blocks (11).
2. The pipeline limiting device of the high-pressure constant-flow pump pipe for the liquid chromatography according to claim 1, which is characterized in that: the surface of the outer fixing frame (1) and one side close to the connecting shaft (2) are penetrated by threaded pieces (12), mounting holes are formed in the top and the bottom of the surfaces of the two threaded pieces (12) in the inner cavity, and the inner cavities of the two mounting holes are connected with limiting rods (13) in a threaded mode.
3. The pipeline limiting device of the high-pressure constant-flow pump pipe for the liquid chromatography according to claim 1, which is characterized in that: two arc connecting seat (10) all are through elastic connection piece (11) first guard plate of fixedly connected with (14) and second guard plate (15) respectively to the middle part of arc connecting seat (10) one side and the equal fixedly connected with extrusion pad in one side of first guard plate (14) and second guard plate (15).
4. The pipeline limiting device of the high-pressure constant-flow pump pipe for the liquid chromatography according to claim 3, which is characterized in that: the mounting groove has been seted up at the top of first guard plate (14) surface one side to middle part between mounting groove inner chamber front and the back has run through axis of rotation (16), spacing hole (17) have all been seted up at the both sides and the top on the outside positive surface of axis of rotation (16), the left side and the bottom of axis of rotation (16) just are located fixed being connected with of the fixed knot (18) of first guard plate (14).
5. The pipeline limiting device of the high-pressure constant-flow pump pipe for the liquid chromatography according to claim 4, which is characterized in that: the left side fixedly connected with switching hasp (19) between mounting groove inner chamber front and the back to the standing groove has been seted up on the surface at second guard plate (15) top, the activity axle (20) has been run through to the left side between front of standing groove inner chamber and the back.
6. The pipeline limiting device of the high-pressure constant-flow pump pipe for the liquid chromatography according to claim 4, which is characterized in that: the outer surface winding fixedly connected with fixed band (21) of axis of rotation (16) to one side of fixed band (21) encircles loose axle (20) and switching hasp (19) in proper order, middle part fixedly connected with fixed strip (22) on fixed band (21) right side.
7. The pipeline limiting device of the high-pressure constant-flow pump pipe for the liquid chromatography according to claim 6, which is characterized in that: the right side on fixed strip (22) surface is through swing joint between connecting bolt (23) and the bottom of standing groove inner chamber to the mounting hole has all been seted up to the both sides on fixed strip (22) surface.
8. The pipeline limiting device of the high-pressure constant-flow pump pipe for the liquid chromatography according to claim 1, which is characterized in that: fixing holes are formed in one side of the top and the bottom of the outer fixing frame (1), and a limiting shaft (24) is connected to the inner cavity of each fixing hole in a threaded mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111024074.5A CN113738637B (en) | 2021-09-02 | 2021-09-02 | Pipeline limiting device of high-pressure constant-flow pump pipe for liquid chromatography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111024074.5A CN113738637B (en) | 2021-09-02 | 2021-09-02 | Pipeline limiting device of high-pressure constant-flow pump pipe for liquid chromatography |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113738637A true CN113738637A (en) | 2021-12-03 |
| CN113738637B CN113738637B (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111024074.5A Active CN113738637B (en) | 2021-09-02 | 2021-09-02 | Pipeline limiting device of high-pressure constant-flow pump pipe for liquid chromatography |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113738637B (en) |
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| Publication number | Publication date |
|---|---|
| CN113738637B (en) | 2023-12-01 |
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Effective date of registration: 20231103 Address after: 224000 Phoenix Science and Technology Park, Longgang Town, Yandu District, Yancheng City, Jiangsu Province Applicant after: Foshan Shunde Yuanjing Moulding Electric Co.,Ltd. Address before: 224000 Fenghuang Industrial Park, Longgang Town, Yandu District, Yancheng City, Jiangsu Province (Group 5, Longgang Fenghuang neighborhood committee) Applicant before: JIANGSU TONGJI ANALYTICAL INSTRUMENT CO.,LTD. |
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