CN108444905A - The calibration method of smooth piece of positive static pressure in swinging friction coefficient measuring apparatus - Google Patents
The calibration method of smooth piece of positive static pressure in swinging friction coefficient measuring apparatus Download PDFInfo
- Publication number
- CN108444905A CN108444905A CN201810458816.7A CN201810458816A CN108444905A CN 108444905 A CN108444905 A CN 108444905A CN 201810458816 A CN201810458816 A CN 201810458816A CN 108444905 A CN108444905 A CN 108444905A
- Authority
- CN
- China
- Prior art keywords
- hoistable platform
- smooth piece
- weighing module
- smooth
- dial gauge
- 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.)
- Pending
Links
- 230000003068 static effect Effects 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000005303 weighing Methods 0.000 claims abstract description 50
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims description 12
- 230000005389 magnetism Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Automation & Control Theory (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The present invention provides a kind of calibration method of smooth piece of positive static pressure in swinging friction coefficient measuring apparatus, it is related to measurement and calibration field, by the way that the pendulum for being equipped with smooth piece is fixed on pressure calibration frame, smooth piece of bottom end is contacted by smooth component with the face of weighing of Weighing module, Weighing module is positioned on hoistable platform, dial gauge is fixed on magnetic bracket, simultaneously, the measurement head of dial gauge is disposed vertically on hoistable platform, slowly rotation hoistable platform, when the indicating value of Weighing module changes, read the value of dial gauge, hoistable platform is rotated again, when the indicating value of Weighing module is shown as 2263g, read the value of dial gauge at this time, it is smooth piece of length deformation amount that two values are only poor.For the present invention by using dial gauge, Weighing module and hoistable platform realize the calibration of smooth piece of positive static pressure, simple to operate, greatly improve the prover time of smooth piece of positive static pressure.
Description
Technical field
The present invention relates to a kind of smooth piece in measurement and calibration field more particularly to swinging friction coefficient measuring apparatus positive static pressure
The calibration method of power.
Background technology
Pavement Skid Resistance is one of the key technology of one n-th-trem relation n people life property safety of highway and arterial highway.
Today that highway construction flourishes, the antiskid performance on road surface increasingly become the content of highway communication concern.Road is applied at present
Antiskid service check during work mainly uses pendulum friction coefficient determinator to test.
Pendulum friction coefficient determinator is a kind of special instrument for being tested material surface friction coefficient, is applicable in
In road surface, airfield pavement, parking lot and other materials with plane characteristic.The operation principle of pendulum friction coefficient determinator
It is：One piece smooth piece of the pendulum bottom installation of pendulum friction coefficient determinator, it is smooth when pendulum is from certain altitude oneself bottom
Block face is contacted with testing surface.The energy that part is lost due to friction between the two is equal with the losses of potential energy of pendulum,
The friction coefficient of tested surface can be obtained by the losses of potential energy of pendulum.The size of wherein smooth piece positive static pressure directly affects
To the accuracy of pendulum friction coefficient determinator, and then influence the detection of road pavement antiskid performance.
It is at present that pendulum is reversely vertical to the method for smooth piece in pendulum friction coefficient determinator positive static pressure test
The method put, pull smooth piece to move down by 2263g counterweights, and then length deformation amount is measured using amesdial.It is this
Method operation is sufficiently complex, and since smooth piece of surface is smooth, when hanging up counterweight, extremely easy generation is fallen, to sliding on pendulum
When slipping block forward direction static pressure and being adjusted, need, by removing on pressure calibration frame, to waste the plenty of time, affect smooth piece of calibration
The efficiency of positive static pressure.
Invention content
The purpose of the present invention is to provide a kind of calibration sides of smooth piece in swinging friction coefficient measuring apparatus positive static pressure
Method, to solve the above technical problems.
The present invention using following technical scheme in order to solve the above technical problems, realized：
The calibrating installation of smooth piece of positive static pressure in a kind of swinging friction coefficient measuring apparatus, it is characterised in that：Including magnetic
Property holder (1), dial gauge (2), pressure calibration frame (3), goods of furniture for display rather than for use (4), smooth component (5), Weighing module (6) and hoistable platform
(7)；The goods of furniture for display rather than for use (4) is mounted on pressure calibration frame (3), and the lower end of goods of furniture for display rather than for use (4) is connected with smooth piece；The Weighing module
(6) it is placed on hoistable platform (7), the Weighing module (6) and hoistable platform (7) are located at the lower section of goods of furniture for display rather than for use (4)；Described smooth group
Part (5) is between smooth piece and Weighing module (6)；The magnetic bracket (1) is adsorbed in the bottom surface of pressure calibration frame (3) vertically
On, dial gauge (2) is fixed on magnetic bracket (1), the upper table of the measurement head perpendicular contact of dial gauge (2) to hoistable platform (7)
Face；The smooth component (5) includes the sliding block (51) that a lower part is smooth disc, and the top of sliding block (51) is provided with V-groove,
The angle of V-groove is 90 °, the opening upwards of V-groove, setting connecting rod rest (52) in V-groove, the connecting rod rest with described smooth piece
Connection.
Preferably, the maximum range of the dial gauge (2) is more than 6mm.
Preferably, the Weighing module (6) is formed by weighing with display module, maximum range is more than 3000g, and has
There is Protection Counter Functions.
Preferably, the maximum range that the hoistable platform (7) can lift is more than 6mm.
Preferably, the connecting rod rest includes a first connecting rod being obliquely installed and longitudinally connected in first connecting rod stage casing
Second connecting rod, the upper end of first connecting rod and second connecting rod is connected to the lower face of goods of furniture for display rather than for use (4)；The lower end of the first connecting rod has
There are one right-angle side, which coordinates with V-groove.
Preferably, the lower face setting of the goods of furniture for display rather than for use (4) is fluted, the upper end of the first connecting rod and second connecting rod connects
It is connected in groove.
It is a further object to provide a kind of calibration methods using above-mentioned calibrating installation, it is characterised in that：
Include the following steps：
1) goods of furniture for display rather than for use (4) and be connected on goods of furniture for display rather than for use (4) smooth piece are installed on pressure calibration frame (3)；
2) hoistable platform (7) is positioned over to the lower section of goods of furniture for display rather than for use (4), Weighing module (6) is placed on hoistable platform (7)；
3) mobile Weighing module (6) and hoistable platform (7) make connecting rod rest (52) and the V-groove of sliding block (51) coordinate, sliding block
(51) lower part can touch the weighing surface (61) of Weighing module (6)；
4) magnetic bracket (1) is adsorbed on the bottom surface of pressure calibration frame (3) vertically, dial gauge (2) is fixed on magnetism
After holder (1), adjusting magnetic bracket (1) makes the measurement head perpendicular contact of dial gauge (2) to the upper surface of hoistable platform (7)；
5) hoistable platform (7) is slowly adjusted, when the indicating value of Weighing module (6) generates minor change by zero, presses clearing
Button；The indicating value La of dial gauge (2) at this time is read, adjusts hoistable platform (7) again, when the indicating value of Weighing module (6) reaches
When 2263g, the indicating value Lb of dial gauge (2) is read, then smooth piece of length deformation amount is L1=Lb-La；
6) it repeats step 3)-step 5) 2 times, obtains smooth piece of length deformation amount L2, L3. and take being averaged for L1, L2 and L3
Value is used as calibration result, judges whether it meets the requirement of corresponding specification.
The beneficial effects of the invention are as follows：
1, hoistable platform is used, smooth piece of length deformation amount is converted to the variable quantity of dial gauge indicating value, realizes
The intuitive display of smooth piece of length deformation amount.
2, Weighing module is used, the intuitive display of smooth piece of positive static pressure is realized.
3, autocratic pressure calibration frame is used, the online adjustment of smooth piece of positive static pressure can be realized, to meet phase
The a large amount of time has been saved in the requirement for answering specification.
It is smooth disc by lower part 4. smooth piece is transmitted normal pressure between Weighing module provided with smooth component
Sliding block can discharge horizontal pressure force.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structural schematic diagram of the smooth component of the present invention；
Reference numeral：1- magnetic brackets；2- dial gauges；3- pressure calibration framves；4- goods of furniture for display rather than for uses；The smooth components of 5-；6- weighs mould
Block；7- hoistable platforms；51- sliding blocks；52- connecting rod rests；61- weighing surfaces.
Specific implementation mode
In order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, tie below
Specific embodiments and the drawings are closed, the present invention is further explained, but following embodiments are only the preferred embodiment of the present invention, not
All.Based on the implementation example in the implementation mode, those skilled in the art are obtained without making creative work
Other embodiments belong to protection scope of the present invention.
Specific embodiments of the present invention are described below in conjunction with the accompanying drawings.
As shown in Figs. 1-2,
The calibrating installation and calibration method of smooth piece of positive static pressure in a kind of swinging friction coefficient measuring apparatus
Calibrating installation, including magnetic bracket 1, dial gauge 2, pressure calibration frame 3, goods of furniture for display rather than for use 4, smooth component 5, Weighing module 6
With hoistable platform 7；Goods of furniture for display rather than for use 4 is mounted on pressure calibration frame 3, and the lower end of goods of furniture for display rather than for use 4 is connected with smooth piece；Weighing module 6 is placed in liter
It drops on platform 7, Weighing module 6 and hoistable platform 7 are located at the lower section of goods of furniture for display rather than for use 4；Smooth component 5 is located at smooth piece and Weighing module 6
Between；Magnetic bracket 1 is adsorbed in vertically on the bottom surface of pressure calibration frame 3, and dial gauge 2 is fixed on magnetic bracket 1, dial gauge 2
Measurement head perpendicular contact to the upper surface of hoistable platform 7；Smooth component 5 includes the sliding block 51 that a lower part is smooth disc,
The top of sliding block 51 is provided with V-groove, and the angle of V-groove is 90 °, the opening upwards of V-groove, and connecting rod rest 52 is arranged in V-groove,
Connecting rod rest is connect with described smooth piece
Calibration method includes the following steps：
1) goods of furniture for display rather than for use 4 and be connected on goods of furniture for display rather than for use 4 smooth piece are installed on pressure calibration frame 3；
2) hoistable platform 7 is positioned over to the lower section of goods of furniture for display rather than for use 4, Weighing module 6 is placed on hoistable platform 7；
3) mobile Weighing module 6 and hoistable platform 7 make connecting rod rest 52 and the V-groove of sliding block 51 coordinate, 51 lower part energy of sliding block
Enough touch the weighing surface 61 of Weighing module 6；
4) magnetic bracket 1 is adsorbed in vertically on the bottom surface of pressure calibration frame 3, dial gauge 2 is fixed on magnetic bracket 1
Afterwards, adjusting magnetic bracket 1 makes the measurement head perpendicular contact of dial gauge 2 to the upper surface of hoistable platform 7；
5) hoistable platform 7 is slowly adjusted, when the indicating value of Weighing module 6 generates minor change by zero, presses reset button；
The indicating value La of dial gauge 2 at this time is read, adjusts hoistable platform 7 again, when the indicating value of Weighing module 6 reaches 2263g, reads hundred
Divide the indicating value Lb of table 2, then smooth piece of length deformation amount is L1=Lb-La；
6) it repeats step 3)-step 5) 2 times, obtains smooth piece of length deformation amount L2, L3. and take being averaged for L1, L2 and L3
Value is used as calibration result, judges whether it meets the requirement of corresponding specification.
Present invention employs autocratic pressure calibration framves, flat by using dial gauge, Weighing module, magnetic bracket and lifting
Platform realizes the calibration problem of smooth piece of positive static pressure in pendulum friction coefficient determinator.By the pendulum that will be equipped with smooth piece
Part is fixed on pressure calibration frame, and smooth piece of bottom end is contacted by smooth component with the face of weighing of Weighing module, Weighing module
It is positioned on hoistable platform, dial gauge is fixed on magnetic bracket, meanwhile, the measurement head of dial gauge is disposed vertically puts down in lifting
On platform, hoistable platform is slowly rotated, when the indicating value of Weighing module changes, reads the value of dial gauge, again rotation lifting
Platform reads the value of dial gauge at this time when the indicating value of Weighing module is shown as 2263g, the two values only poor length for being smooth piece
Deflection.For the present invention by using dial gauge, Weighing module and hoistable platform realize the calibration of smooth piece of positive static pressure,
It is simple to operate, greatly improve the prover time of smooth piece of positive static pressure.
If smooth piece of length deformation amount does not reach the requirement of corresponding specification, the top of the pendulum by the way that smooth piece will be equipped with
Screw is adjusted, and is tested again, until reaching corresponding requirement.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
For personnel it should be appreciated that the present invention is not limited to the above embodiments, described in the above embodiment and specification is only the present invention
Preference, be not intended to limit the present invention, without departing from the spirit and scope of the present invention, the present invention also has various
Changes and improvements, these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by institute
Attached claims and its equivalent thereof.
Claims (7)
1. the calibrating installation of smooth piece of positive static pressure in a kind of swinging friction coefficient measuring apparatus, it is characterised in that：Including magnetism
Holder (1), dial gauge (2), pressure calibration frame (3), goods of furniture for display rather than for use (4), smooth component (5), Weighing module (6) and hoistable platform (7)；
The goods of furniture for display rather than for use (4) is mounted on pressure calibration frame (3), and the lower end of goods of furniture for display rather than for use (4) is connected with smooth piece；
The Weighing module (6) is placed on hoistable platform (7), and the Weighing module (6) and hoistable platform (7) are located at goods of furniture for display rather than for use (4)
Lower section；The smooth component (5) is between smooth piece and Weighing module (6)；
The magnetic bracket (1) is adsorbed on the bottom surface of pressure calibration frame (3) vertically, and dial gauge (2) is fixed on magnetic bracket (1)
On, the upper surface of the measurement head perpendicular contact of dial gauge (2) to hoistable platform (7)；
The smooth component (5) includes the sliding block (51) that a lower part is smooth disc, and the top of sliding block (51) is provided with V-type
The angle of slot, V-groove is 90 °, the opening upwards of V-groove, setting connecting rod rest (52) in V-groove, the connecting rod rest and the cunning
Slip block connection.
2. the calibrating installation of smooth piece of positive static pressure, special in swinging friction coefficient measuring apparatus according to claim 1
Sign is：The maximum range of the dial gauge (2) is more than 6mm.
3. the calibrating installation of smooth piece of positive static pressure, special in swinging friction coefficient measuring apparatus according to claim 1
Sign is：The Weighing module (6) is formed by weighing with display module, and maximum range is more than 3000g, and with clearing work(
Energy.
4. the calibrating installation of smooth piece of positive static pressure, special in swinging friction coefficient measuring apparatus according to claim 1
Sign is：The maximum range that the hoistable platform (7) can lift is more than 6mm.
5. the calibrating installation of smooth piece of positive static pressure, special in swinging friction coefficient measuring apparatus according to claim 1
Sign is：The connecting rod rest includes a first connecting rod being obliquely installed and longitudinally connected the second company in first connecting rod stage casing
The upper end of bar, first connecting rod and second connecting rod is connected to the lower face of goods of furniture for display rather than for use (4)；There are one straight for the lower end tool of the first connecting rod
The arm of angle, the right-angle side coordinate with V-groove.
6. the calibrating installation of smooth piece of positive static pressure, special in swinging friction coefficient measuring apparatus according to claim 5
Sign is：The lower face setting of the goods of furniture for display rather than for use (4) is fluted, and the upper end of the first connecting rod and second connecting rod is connected to groove
It is interior.
7. utilizing the calibration method of the calibrating installation described in any one of claim 1-6, it is characterised in that：
Include the following steps：
1) goods of furniture for display rather than for use (4) and be connected on goods of furniture for display rather than for use (4) smooth piece are installed on pressure calibration frame (3)；
2) hoistable platform (7) is positioned over to the lower section of goods of furniture for display rather than for use (4), Weighing module (6) is placed on hoistable platform (7)；
3) mobile Weighing module (6) and hoistable platform (7) make connecting rod rest (52) and the V-groove of sliding block (51) coordinate, sliding block (51)
Lower part can touch the weighing surface (61) of Weighing module (6)；
4) magnetic bracket (1) is adsorbed on the bottom surface of pressure calibration frame (3) vertically, dial gauge (2) is fixed on magnetic bracket
(1) after, adjusting magnetic bracket (1) makes the measurement head perpendicular contact of dial gauge (2) to the upper surface of hoistable platform (7)；
5) hoistable platform (7) is slowly adjusted, when the indicating value of Weighing module (6) generates minor change by zero, presses reset button；
The indicating value La of dial gauge (2) at this time is read, adjusts hoistable platform (7) again, when the indicating value of Weighing module (6) reaches 2263g,
The indicating value Lb of dial gauge (2) is read, then smooth piece of length deformation amount is L1=Lb-La；
6) it repeats step 3)-step 5) 2 times, obtains smooth piece of length deformation amount L2, L3. and the average value of L1, L2 and L3 is taken to make
For calibration result, judge whether it meets the requirement of corresponding specification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810458816.7A CN108444905A (en) | 2018-05-15 | 2018-05-15 | The calibration method of smooth piece of positive static pressure in swinging friction coefficient measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810458816.7A CN108444905A (en) | 2018-05-15 | 2018-05-15 | The calibration method of smooth piece of positive static pressure in swinging friction coefficient measuring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108444905A true CN108444905A (en) | 2018-08-24 |
Family
ID=63203628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810458816.7A Pending CN108444905A (en) | 2018-05-15 | 2018-05-15 | The calibration method of smooth piece of positive static pressure in swinging friction coefficient measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108444905A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050065921A (en) * | 2003-12-26 | 2005-06-30 | 노틸러스효성 주식회사 | Measuring device of the frictional coefficient and carring distance between roller and material |
| CN201269850Y (en) * | 2008-10-08 | 2009-07-08 | 上海市政工程设计研究总院 | Constant pressure type pendulum instrument |
| CN101587058A (en) * | 2009-07-20 | 2009-11-25 | 中国航空工业第一集团公司北京长城计量测试技术研究所 | High-precision pendulum friction coefficient measuring instrument |
| CN101666738A (en) * | 2009-09-16 | 2010-03-10 | 交通部公路科学研究院 | Photoelectric friction coefficient tester |
| CN106483067A (en) * | 2016-11-27 | 2017-03-08 | 徐州工程学院 | Critical coefficient of rolling friction measures device and method |
| CN206177788U (en) * | 2016-11-12 | 2017-05-17 | 交通运输部公路科学研究所 | Pendulum calibrating device |
| CN208125589U (en) * | 2018-05-15 | 2018-11-20 | 广东华路交通科技有限公司 | The calibrating installation of smooth piece of positive static pressure in swinging friction coefficient measuring apparatus |
-
2018
- 2018-05-15 CN CN201810458816.7A patent/CN108444905A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050065921A (en) * | 2003-12-26 | 2005-06-30 | 노틸러스효성 주식회사 | Measuring device of the frictional coefficient and carring distance between roller and material |
| CN201269850Y (en) * | 2008-10-08 | 2009-07-08 | 上海市政工程设计研究总院 | Constant pressure type pendulum instrument |
| CN101587058A (en) * | 2009-07-20 | 2009-11-25 | 中国航空工业第一集团公司北京长城计量测试技术研究所 | High-precision pendulum friction coefficient measuring instrument |
| CN101666738A (en) * | 2009-09-16 | 2010-03-10 | 交通部公路科学研究院 | Photoelectric friction coefficient tester |
| CN206177788U (en) * | 2016-11-12 | 2017-05-17 | 交通运输部公路科学研究所 | Pendulum calibrating device |
| CN106483067A (en) * | 2016-11-27 | 2017-03-08 | 徐州工程学院 | Critical coefficient of rolling friction measures device and method |
| CN208125589U (en) * | 2018-05-15 | 2018-11-20 | 广东华路交通科技有限公司 | The calibrating installation of smooth piece of positive static pressure in swinging friction coefficient measuring apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108317991A (en) | A kind of plank automatic detection system | |
| CN206002085U (en) | Building leveller | |
| CN108827193B (en) | Detection device for accurately detecting flatness of template | |
| CN102878911B (en) | Folium equivalent weight measuring device | |
| CN103645009A (en) | Torque wrench calibrator | |
| CN107121102B (en) | Pipe fitting inspection platform | |
| CN208125589U (en) | The calibrating installation of smooth piece of positive static pressure in swinging friction coefficient measuring apparatus | |
| CN108444905A (en) | The calibration method of smooth piece of positive static pressure in swinging friction coefficient measuring apparatus | |
| CN103969003A (en) | Measuring device for center of gravity of micro mobile robot | |
| CN205562355U (en) | Stone material curtain bears strength test device | |
| CN204731146U (en) | A kind of precision pulling device for testing tensile force | |
| CN107941691B (en) | Surface friction coefficient tester for bulk material | |
| CN209606005U (en) | A kind of pressure gauge protective device | |
| CN101477032B (en) | Apparatus for testing friction and self-locking | |
| CN211452134U (en) | Detection equipment for compressed length and weight of transmission shaft assembly | |
| CN207133133U (en) | One kind detects efficiently modulus of elasticity of concrete analyzer | |
| CN206891392U (en) | Ceramic sheet testing agency | |
| CN207850269U (en) | A kind of end-cap assembly perpendicularity detection tool | |
| CN207832096U (en) | A kind of device measuring subway bearing outer ring angle of flange 20 ' | |
| CN206321192U (en) | A kind of flank of tooth verticality measurement device | |
| CN205580428U (en) | Novel axle type part detects device | |
| CN215640173U (en) | Integrated device for measuring material angle | |
| CN105115663B (en) | Two-way force value experimental rig | |
| CN219657120U (en) | Adjustable detects platform | |
| CN206944896U (en) | A kind of more specification detection means of nailing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |