CN112230063A - Measuring pen with meter - Google Patents
Measuring pen with meter Download PDFInfo
- Publication number
- CN112230063A CN112230063A CN202011079441.7A CN202011079441A CN112230063A CN 112230063 A CN112230063 A CN 112230063A CN 202011079441 A CN202011079441 A CN 202011079441A CN 112230063 A CN112230063 A CN 112230063A
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- Prior art keywords
- pen
- measuring
- groove
- clamping
- point
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- 241000180587 Pinnidae Species 0.000 claims abstract description 34
- 238000005259 measurement Methods 0.000 claims abstract description 26
- 239000002184 metal Substances 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000006061 abrasive grain Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 229920006324 polyoxymethylene Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 229930040373 Paraformaldehyde Natural products 0.000 claims 1
- -1 polyoxymethylene Polymers 0.000 claims 1
- 230000006872 improvement Effects 0.000 description 9
- 239000003973 paint Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
- G01R1/06711—Probe needles; Cantilever beams; "Bump" contacts; Replaceable probe pins
- G01R1/06716—Elastic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
- G01R1/06711—Probe needles; Cantilever beams; "Bump" contacts; Replaceable probe pins
- G01R1/06755—Material aspects
- G01R1/06761—Material aspects related to layers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The application provides a measurement pen-shape metre includes: the pen comprises a pen point, a measuring pen core and a pen shell; the surface of the pen point is provided with metal abrasive grains, and the pen point is arranged at one end of the pen shell; the measuring pen core is arranged in the pen shell in a sliding mode, the measuring pen core is connected with the universal meter through a lead, and the head of the measuring pen core can extend out of the pen head. The technical problem of still lack a measuring tool that is applicable in substation equipment and ground net connecting resistance measurement work among the prior art is solved in this application.
Description
Technical Field
The application relates to the field of electric power measuring equipment, in particular to a measuring meter pen.
Background
The measurement of the connection resistance between the substation equipment and the ground grid is a common means for checking whether the connection between the equipment framework, the equipment shell, the terminal box mechanism box and the like and the ground grid is intact. In this detection work, because equipment framework, shell all are scribbled paint, can't direct measurement its connecting resistance to the ground screen, current measurement method has two kinds, one kind is to use file to file its surface paint earlier, use the universal meter pen-shape metre to measure again, however this measurement method need use file and pen-shape metre in turn, it is very inconvenient to measure, another kind adopts file direct and universal meter connection, make the file replace the pen-shape metre to measure, however the file is not dedicated pen-shape metre, adopt the file to measure and can influence the measuring structure, and the connection between file and the universal meter drops easily, cause and measure inaccurately. Therefore, a measuring tool applicable to measuring the connection resistance of the substation equipment and the grounding grid is still lacked in the prior art.
Disclosure of Invention
The application aims to provide a measuring meter pen for solving the technical problem that a measuring tool applicable to measuring work of transformer substation equipment and grounding grid connecting resistance is still lacked in the prior art.
In order to solve the above problem, the present application provides a measuring stylus, including: the pen comprises a pen point, a measuring pen core and a pen shell;
the surface of the pen point is provided with metal abrasive grains, and the pen point is arranged at one end of the pen shell;
the measuring pen core is arranged in the pen shell in a sliding mode, the measuring pen core is connected with the universal meter through a lead, and the head of the measuring pen core can extend out of the pen head.
Further, the device also comprises a spring;
the spring is arranged between the pen point and the measuring pen core, the lower end of the spring is clamped on the pen point, and the upper end of the spring is clamped on the measuring pen core.
Furthermore, a clamping groove and a clamping block are formed in the side wall of the pen shell;
the clamping groove penetrates through the side wall of the pen shell, and a first clamping position and a second clamping position are arranged on the clamping groove;
the lower end of the clamping block is fixedly connected with the measuring pen core, and the upper end of the clamping block extends out of the upper surface of the clamping groove;
under the state that the clamping block is clamped in the first clamping position, the head of the measuring pen core extends out of the pen point; and when the clamping block is clamped in the second clamping position, the head of the measuring pen core retracts into the pen point.
Further, the clamping groove comprises a horizontal groove and a vertical groove;
the length direction of the vertical groove is parallel to the length direction of the measuring pen core;
the horizontal groove is vertical to the vertical groove, and one end of the horizontal groove is communicated with one end of the vertical groove close to the pen point;
the first clamping position is arranged at the other end of the horizontal groove, and the second clamping position is arranged at one end, far away from the pen point, of the vertical groove.
Further, a notch is formed in the side wall, corresponding to the first clamping area, of the clamping groove;
the opening of the notch faces the pen point.
Furthermore, the clamping block is a screw;
and a screw hole is formed in the position, corresponding to the screw, of the measuring pen core, and the screw is connected with the screw hole in a matched mode.
Furthermore, the whole pen point is made of hard metal materials.
Further, the pen shell is made of polyformaldehyde resin.
Further, the material of the measuring pen core is copper.
Furthermore, the pen point is connected with the pen shell in a matched mode through a threaded structure.
Compared with the prior art, the embodiment of the application has the advantages that:
the measuring meter pen provided by the application comprises a pen point, a measuring pen core and a pen shell, wherein the surface of the pen point is provided with metal abrasive grains instead of a file, the measuring pen core is arranged in the pen shell in a sliding manner, is connected with a universal meter through a lead by a lead, and the pen point of the measuring pen core can extend out of the shell head, therefore, when the measuring pen is used, the measuring pen core is retracted into the pen head, paint on the surface of the transformer substation equipment is removed by the metal abrasive grain on the surface of the pen head, the measuring pen core extends out of the pen head to measure the transformer substation equipment shell, the whole operation process can be finished by adopting the measuring pen without replacing a file and the measuring pen in turn, the measuring efficiency is improved, and the accuracy of measured data is ensured, therefore, the technical problem that a measuring tool applicable to measuring work of the transformer substation equipment and the grounding grid connecting resistance is still lacked in the prior art is solved.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a measurement stylus provided in an embodiment of the present application;
FIG. 2 is a cross-sectional view of a measurement stylus provided in an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a pen casing in an embodiment of the present application;
wherein the reference numerals are: the pen comprises a pen point 1, a measuring pen core 2, a pen shell 3, a clamping groove 4, a clamping block 5, a vertical groove 6, a horizontal groove 7, a first clamping position 8, a second clamping position 9 and a notch 10.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all 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 application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
For easy understanding, please refer to fig. 1 to 3, fig. 1 is a schematic structural diagram of a measurement stylus according to an embodiment of the present disclosure; FIG. 2 is a cross-sectional view of a measurement stylus provided in an embodiment of the present application; fig. 3 is a schematic structural diagram of a pen case in the embodiment of the present application.
The embodiment of the application provides a measurement pen-shape metre includes: the pen comprises a pen point 1, a measuring pen core 2 and a pen shell 3;
the surface of the pen point 1 is provided with metal abrasive grains, and the pen point 1 is arranged at one end of the pen shell 3;
the measuring pen core 2 is arranged in the pen shell 3 in a sliding mode, the measuring pen core 2 is connected with the universal meter through a lead, and the head of the measuring pen core 2 can extend out of the pen head 1.
The pen point 1 is bullet-shaped, and the metal abrasive particles cover the entire outer surface of the pen point 1, so that the pen point 1 can abrade paint on the surface of the substation equipment no matter in which direction; the pen shell 3 can be rectangular column shape, specifically can be cylindric or square column shape etc., this implementation is preferred cylindricly, it is more comfortable to make the staff hold a pen, have better feeling, nib 1 is connected with pen shell 3 and forms complete casing, the length of measuring refill 2 slightly is less than this casing, under not measuring state, the head of measuring refill 2 retracts into in nib 1, whole measuring refill 2 all is arranged in the casing, under measuring state, the head of measuring refill 2 stretches out outside nib 1, thereby contact through the head that will measure refill 2 and the transformer substation equipment watchcase, alright measure its resistance.
The application provides a measurement pen-shape metre, including nib 1, measurement refill 2 and pen shell 3, the surface of nib 1 is provided with the metal grit, replace the use of file, a paint for getting rid of substation equipment surface, measurement refill 2 slides and sets up in pen shell 3, measurement refill 2 passes through the wire and is connected through the wire with the universal meter, 1 protractile nibs in the nib of measurement refill 2 is out of the shell, thereby, the measurement pen-shape metre of this application is when using, earlier with measuring refill 2 retract to nib 1 in nib 1, and get rid of the paint on substation equipment surface with the metal grit on nib 1 surface, stretch out measurement refill 2 again in nib 1 and measure substation equipment watchcase, whole operation process adopts measurement pen-shape metre alright accomplish, need not to replace file and pen-shape metre in turn, measurement efficiency is improved, and measured data's degree of accuracy has been guaranteed, thereby this application has still lacked among the prior art an applicable transformer substation equipment and ground net connecting resistance measurement worker Technical problem of the measuring tool.
As a further improvement, the measuring stylus provided by the embodiment of the application further comprises a spring;
the spring sets up between nib 1 and measuring cartridge 2, and the lower extreme card of spring is located on nib 1, and the upper end card of spring is located on measuring cartridge 2.
Particularly, the spring sets up in the space between measuring cartridge 2 and nib 1, and the spring housing locates the 1 region of nib near this measuring cartridge 2 to when stretching out measuring cartridge 2 in nib 1, need overcome certain spring force and measure, after the measurement is accomplished, cancel the downward real power to measuring cartridge 2, measuring cartridge 2 can automatic retraction in nib 1 under the effect of spring this moment, thereby make the operation more convenient.
As a further improvement, a clamping groove 4 and a clamping block 5 are formed in the side wall of a pen shell 3 of the measuring pen;
the clamping groove 4 penetrates through the side wall of the pen shell 3, and a first clamping position 8 and a second clamping position 9 are arranged on the clamping groove 4;
the lower end of the clamping block 5 is fixedly connected with the measuring pen core 2, and the upper end of the clamping block 5 extends out of the upper surface of the clamping groove 4;
under the state that the clamping block 5 is clamped in the first clamping position 8, the head part of the measuring pen core 2 extends out of the pen point 1; when the blocking block 5 is blocked in the second blocking position 9, the head of the measuring pen core 2 retracts into the pen point 1.
Specifically, the bottom of the clamping groove 4 penetrates through the side wall of the pen shell 3, so that the inside of the pen shell 3 and the outside of the pen shell 3 can be communicated through the clamping groove 4, a first clamping position 8 and a second clamping position 9 are arranged on the clamping groove 4, and the distance between the first clamping position 8 and the pen point 1 is greater than the distance between the second clamping position 9 and the pen point 1;
the lower extreme of screens piece 5 and the side fixed connection of measuring refill 2, the upper end of screens piece 5 stretches out in the upper surface of screens groove 4, screens piece 5 can remove to second screens 9 from first screens 8 in screens groove 4 to realize the distance of stretching out to measuring refill 2 through the cooperation between screens piece 5 and first screens 8, second screens 9.
As a further improvement, the clamping groove 4 of the measuring pen in the embodiment of the application comprises a horizontal groove 7 and a vertical groove 6;
the length direction of the vertical groove 6 is parallel to the length direction of the measuring pen core 2;
the horizontal groove 7 is vertical to the vertical groove 6, and one end of the horizontal groove 7 is communicated with one end of the vertical groove 6 close to the pen point 1;
the first clip 8 is disposed at the other end of the horizontal groove 7, and the second clip 9 is disposed at one end of the vertical groove 6 far away from the pen point 1.
Specifically, the length of the horizontal groove 7 is slightly less than that of the vertical groove 6, the clamping block 5 is located on the second clamping position 9 of the vertical groove 6 in the initial state, when the measuring pen core 2 needs to be extended out of the pen point 1, only the clamping block 5 needs to move along an L-shaped route in the clamping groove 4, the clamping block 5 is clamped on the first clamping position 8 of the horizontal groove 7, the moving route of the clamping block 5 is simplified, namely, the operation steps are simplified, and the measuring efficiency of the measuring pen core 2 is improved.
As a further improvement, the side wall of the position clamping groove 4 of the measuring pen is provided with a notch 10 corresponding to the first position clamping part 8; the opening of the notch 10 faces the pen point 1, so that when the clamping block 5 is located in the first clamping position 8, the clamping block 5 can be clamped more effectively through the notch 10, and the clamping block 5 is prevented from being separated from the first clamping position 8.
As a further improvement, the clamping block 5 of the measuring pen with the meter provided by the embodiment of the application is a screw, the measuring pen core 2 is provided with a screw hole corresponding to the position of the screw, and the screw is matched and connected with the screw hole. Adopt the screw as screens piece 5 in this embodiment, when needs change screens piece 5 or need change measuring pen core 2, only need with the screw correspond twist the screw hole alright out, improved the efficiency of dismantlement, when needs installation screens piece 5, only need with the screw turn the screw into corresponding screw hole alright, improved the efficiency of installation.
As a further improvement, the entire pen point 1 of the measuring stylus provided by the embodiment of the present application is made of a hard metal material, and the pen point 1 made of the hard metal material is harder and more wear-resistant, which is beneficial to prolonging the service life of the pen point 1.
As further improvement, the material of the pen shell 3 of the measuring pen is polyformaldehyde resin, so that the pen shell 3 has good insulating property, and safety accidents are avoided.
As a further improvement, the material of the measuring pen core 2 of the measuring pen provided by the embodiment of the present application is copper, and the adoption of copper is favorable for improving the guiding performance of the measuring pen core 2, thereby further improving the measuring accuracy.
As a further improvement, the pen point 1 and the pen shell 3 of the measuring pen with the meter provided by the embodiment of the application are connected in a matched mode through the threaded structure, so that the pen point 1 and the pen shell 3 are more convenient to detach and install.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A measuring stylus, comprising: the pen comprises a pen point, a measuring pen core and a pen shell;
the surface of the pen point is provided with metal abrasive grains, and the pen point is arranged at one end of the pen shell;
the measuring pen core is arranged in the pen shell in a sliding mode, the measuring pen core is connected with the universal meter through a lead, and the head of the measuring pen core can extend out of the pen head.
2. The measurement stylus according to claim 1, further comprising a spring;
the spring is arranged between the pen point and the measuring pen core, the lower end of the spring is clamped on the pen point, and the upper end of the spring is clamped on the measuring pen core.
3. The measuring stylus according to claim 1 or 2, wherein a retaining groove and a retaining block are formed on a side wall of the pen casing;
the clamping groove penetrates through the side wall of the pen shell, and a first clamping position and a second clamping position are arranged on the clamping groove;
the lower end of the clamping block is fixedly connected with the measuring pen core, and the upper end of the clamping block extends out of the upper surface of the clamping groove;
under the state that the clamping block is clamped in the first clamping position, the head of the measuring pen core extends out of the pen point; and when the clamping block is clamped in the second clamping position, the head of the measuring pen core retracts into the pen point.
4. The measurement stylus according to claim 3, wherein the detent groove comprises a horizontal groove and a vertical groove;
the length direction of the vertical groove is parallel to the length direction of the measuring pen core;
the horizontal groove is vertical to the vertical groove, and one end of the horizontal groove is communicated with one end of the vertical groove close to the pen point;
the first clamping position is arranged at the other end of the horizontal groove, and the second clamping position is arranged at one end, far away from the pen point, of the vertical groove.
5. The measuring stylus according to claim 3, wherein a recess is provided in a side wall of the detent groove corresponding to the first detent region;
the opening of the notch faces the pen point.
6. The measurement stylus according to claim 3, wherein the capture block is a screw;
and a screw hole is formed in the position, corresponding to the screw, of the measuring pen core, and the screw is connected with the screw hole in a matched mode.
7. The measurement stylus according to claim 1, wherein the head is entirely of a hard metal material.
8. The measurement pen according to claim 1, wherein the material of the pen case is polyoxymethylene resin.
9. The measuring stylus according to claim 1, wherein the material of the measuring cartridge is copper.
10. The measurement pen according to claim 1, wherein the pen point and the pen shell are connected in a matching manner through a threaded structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011079441.7A CN112230063A (en) | 2020-10-10 | 2020-10-10 | Measuring pen with meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011079441.7A CN112230063A (en) | 2020-10-10 | 2020-10-10 | Measuring pen with meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112230063A true CN112230063A (en) | 2021-01-15 |
Family
ID=74113274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011079441.7A Pending CN112230063A (en) | 2020-10-10 | 2020-10-10 | Measuring pen with meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112230063A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2105072U (en) * | 1991-05-08 | 1992-05-20 | 吕东升 | Safety metering pen |
| CN2196310Y (en) * | 1993-12-09 | 1995-05-03 | 董勤森 | Multipurpose pen for testing of cutting |
| US6592279B1 (en) * | 2002-09-30 | 2003-07-15 | Perfect Promotional Products, Inc. | Pop-up pen |
| KR100755881B1 (en) * | 2006-06-30 | 2007-09-06 | 주식회사 모리스 | Sliding pen |
| CN201068012Y (en) * | 2007-07-11 | 2008-06-04 | 周志文 | Telescopic pen |
| CN201573403U (en) * | 2010-01-08 | 2010-09-08 | 杨翰林 | Anti-breaking ball pen |
| CN203148989U (en) * | 2013-02-21 | 2013-08-21 | 江苏省电力公司检修分公司 | Universal meter pen |
| CN206684226U (en) * | 2017-04-06 | 2017-11-28 | 中国石油化工股份有限公司 | A kind of lightning protection test pen |
| CN109435558A (en) * | 2018-12-05 | 2019-03-08 | 北京沃尔德金刚石工具股份有限公司 | Carving tool |
| CN209920833U (en) * | 2019-04-19 | 2020-01-10 | 袁熙 | Novel pen |
| CN111239445A (en) * | 2020-02-28 | 2020-06-05 | 广东电网有限责任公司 | Telescopic multimeter test pen |
| CN211375566U (en) * | 2020-01-18 | 2020-08-28 | 天津众亚圣普科技有限公司 | Touch screen contact device for preventing water vapor of warm-bath dual-purpose electric boiler |
-
2020
- 2020-10-10 CN CN202011079441.7A patent/CN112230063A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2105072U (en) * | 1991-05-08 | 1992-05-20 | 吕东升 | Safety metering pen |
| CN2196310Y (en) * | 1993-12-09 | 1995-05-03 | 董勤森 | Multipurpose pen for testing of cutting |
| US6592279B1 (en) * | 2002-09-30 | 2003-07-15 | Perfect Promotional Products, Inc. | Pop-up pen |
| KR100755881B1 (en) * | 2006-06-30 | 2007-09-06 | 주식회사 모리스 | Sliding pen |
| EP1872968A1 (en) * | 2006-06-30 | 2008-01-02 | Morris Corporation | Slide pen |
| CN201068012Y (en) * | 2007-07-11 | 2008-06-04 | 周志文 | Telescopic pen |
| CN201573403U (en) * | 2010-01-08 | 2010-09-08 | 杨翰林 | Anti-breaking ball pen |
| CN203148989U (en) * | 2013-02-21 | 2013-08-21 | 江苏省电力公司检修分公司 | Universal meter pen |
| CN206684226U (en) * | 2017-04-06 | 2017-11-28 | 中国石油化工股份有限公司 | A kind of lightning protection test pen |
| CN109435558A (en) * | 2018-12-05 | 2019-03-08 | 北京沃尔德金刚石工具股份有限公司 | Carving tool |
| CN209920833U (en) * | 2019-04-19 | 2020-01-10 | 袁熙 | Novel pen |
| CN211375566U (en) * | 2020-01-18 | 2020-08-28 | 天津众亚圣普科技有限公司 | Touch screen contact device for preventing water vapor of warm-bath dual-purpose electric boiler |
| CN111239445A (en) * | 2020-02-28 | 2020-06-05 | 广东电网有限责任公司 | Telescopic multimeter test pen |
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