CN106989986B - Explosive loading responds stress test sensor locator - Google Patents
Explosive loading responds stress test sensor locator Download PDFInfo
- Publication number
- CN106989986B CN106989986B CN201710197631.0A CN201710197631A CN106989986B CN 106989986 B CN106989986 B CN 106989986B CN 201710197631 A CN201710197631 A CN 201710197631A CN 106989986 B CN106989986 B CN 106989986B
- Authority
- CN
- China
- Prior art keywords
- backing plate
- sensor
- locating
- diameter
- locating support
- 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.)
- Expired - Fee Related
Links
- 238000011068 loading method Methods 0.000 title claims abstract description 36
- 239000002360 explosive Substances 0.000 title claims abstract description 31
- 238000012360 testing method Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 230000004044 response Effects 0.000 abstract description 11
- 238000004064 recycling Methods 0.000 abstract description 4
- 230000035939 shock Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000013475 authorization Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000003938 response to stress Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/313—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated by explosives
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of explosive loadings to respond stress test sensor locator, including locating support, locating plate, backing plate, sleeve, force-transmitting pole and sensor, locating support is the internal variable diameter steel cylinder body for having boss, one end of locating support and sleeve connection, sleeve are provided with force-transmitting pole；The other end of locating support is connect with backing plate, by the central boss positioning on backing plate, locating plate is installed at the boss inside locating support, one end of locating plate is connect with force-transmitting pole, the other end and sensor are in close contact, and the other end of sensor is installed in the circular groove of backing plate.On the one hand explosive loading response stress test sensor locator of the invention can guarantee sensor after the load that experiences a shock convenient for taking-up and recycling；On the other hand it can ensure that sensor and force-transmitting pole keep good coaxial line, and can prevent sleeve from surprisingly toppling over during loading, stress can be responded for convenient, accurate measurement explosive loading and technical support is provided.
Description
Technical field
The invention belongs to explosive wastewater laboratory experiment engineering device technique field, it is related to object under a kind of impact loading and positions
Device, in particular to a kind of sensor positioning dress suitable for measuring explosive loading response stress under impact loading indirectly
It sets.
Background technique
Explosive loading is often required to be subjected to impact the effect of load in transmitting, Penetration, during these, explosive
The response of powder charge first appears as dynamic response, is the response stress of explosive loading wherein main, and then may influence it
Security performance.The development of modern high performance weapon system proposes safety of the explosive loading under impact loading higher
Requirement, dynamic response of the explosive loading under Impulsive load be also increasingly taken seriously, and therefore, how to realize and fills to explosive
Convenient, the accurate measurement of medicine response stress, it has also become one of the Important Problems of scientific research personnel's concern.
It is general using the side measured indirectly for the safety for ensuring sensor installation process because explosive material easily explodes
Method obtains response stress of the explosive loading under impact loading.In the middle promulgated by the State Council of authorization Publication No. CN 104535439B
In bright patent " dipulse load load testing machine ", sensor is connect with force-transmitting pole, using steel circular cylindrical sensor is straight
The method for being placed in sleeve inner is connect, the dipulse load on-load pressure signal of explosive test specimen is obtained.Its existing main problem is:
Steel sensor can be generated and be radially expanded under percussion, and then be combined closely with sleeve lining, and sensor is caused to be difficult to
Whole taking-up can not reuse.Shiying WANG et al. is in " explosive loading is in the research of the stress test method under hitting of dropping hammer " (2013
Year mechanics metrological testing technology seminar paper monograph) one a kind of explosive loading is disclosed herein under effect of impact of dropping hammer
Stress response test method, wherein sensor is still connect with force-transmitting pole, but sensor is placed in cartridge exterior, avoids steel
Sensor is radially expanded the problem for being difficult to the problem of taking out, but introducing new simultaneously: during Impulsive load, sensor and sleeve
In force-transmitting pole can not accurately keep alignment, and the sample bullet that entirely drops hammer in impact process stability reduce, drop hammer sample bullet very
It can extremely topple over, and then influence experimental test result.
Summary of the invention
For overcome the deficiencies in the prior art and defect, the present invention provide a kind of for measuring under impact loading indirectly
Explosive loading responds the sensor locator of stress, on the one hand which can guarantee sensor in the load that experiences a shock
Afterwards convenient for taking-up and recycling；On the other hand it can ensure that the force-transmitting pole in sensor and sleeve, especially sleeve keeps good
Good coaxial line, and can prevent sleeve from surprisingly toppling over during loading.
Explosive loading provided by the invention responds stress test sensor locator, including locating support, locating plate,
Backing plate, which is characterized in that further include sleeve, force-transmitting pole and sensor, wherein the locating support is the internal change for having boss
Diameter steel cylinder body, the lesser one end of locating support diameter of bore and sleeve connection are equipped with force-transmitting pole in sleeve；Locating support
The side wall of the larger one end of diameter of bore is provided with cable-through hole, ring flange is machined on excircle, and connect with backing plate, by backing plate
Central boss positioning；The backing plate is the plectane with central boss, is machined with circular groove, edge at the center of central boss
Backing plate outer circle is circumferentially evenly arranged with location hole；Locating plate is installed at the boss inside locating support, locating plate be with
The disk of central circular groove, locating plate are connect with one end of central circular groove with force-transmitting pole, and the other end is tight with sensor
Contiguity touching, the other end of sensor are installed in the circular groove of backing plate.
The ratio between the outer diameter of the locating support and sleeve outer diameter are about 1.3~1.5:1；Locating support diameter of bore larger one
The height at end about 1~2cm high compared with the height of sensor, outer diameter about 4~6mm of the internal diameter compared with backing plate central boss；Locating support
For the internal diameter of the smaller one end of diameter of bore compared with sleeve outer diameter about 4~6mm, the internal diameter of backing plate circular groove is big compared with the outer diameter of sensor
About 0.5~1mm；The ratio between height and the height of locating support internal boss of locating plate are 1:2~3, and the outer diameter of locating plate is more fixed
The small about 0.5~1mm of internal diameter at the bracket bosses of position；Outer diameter about 0.5 of the internal diameter of locating plate central circular groove compared with force-transmitting pole
~1mm；The ratio between height of the backing plate central boss and the total height of backing plate about 1:3~4, the depth of backing plate circular groove with
The ratio between total height of backing plate is about 1:1.5~2.
Explosive loading of the invention responds stress test sensor locator, and bring technical effect is embodied in following
Several aspects:
1) steel sensor is placed in locating support by the present invention, so that sensor takes out after the load that experiences a shock
And recycling；
2) pass through the coaxial arrangement and installation of sleeve, locating support, backing plate, locating plate and sensor, it can be ensured that sensing
Force-transmitting pole in device and sleeve keeps good coaxial line, and can prevent sleeve from surprisingly toppling over during loading.
Detailed description of the invention
Fig. 1 is explosive loading response stress test sensor locator structural schematic diagram of the invention.
Fig. 2 is the structural schematic diagram of locating support in the present invention.
Fig. 3 is the structural schematic diagram of backing plate in the present invention.
Fig. 4 is the structural schematic diagram of locating plate in the present invention.
Label in figure respectively indicates: 1, sleeve, 2, force-transmitting pole, 3, locating plate, 4, locating support, 4-1, cable-through hole, 5,
Sensor, 6, backing plate, 6-1, location hole.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples, it should be noted that the present invention not office
It is limited to following specific embodiments, all same transformation carried out on the basis of technical solution of the present invention are in protection scope of the present invention
It is interior.
In compliance with the above technical solution, as Figure 1-Figure 4, the present embodiment provides explosive loading response stress test sensing
Device positioning device, including locating support 4, locating plate 3, backing plate 6, which is characterized in that further include sleeve 1, force-transmitting pole 2 and sensor
5, wherein locating support 4 is the internal variable diameter steel cylinder body for having boss, the ratio between outer diameter and 1 outer diameter of sleeve of locating support 4
About 1.3~1.5:1, the ratio between the outer diameter of locating support 4 and 1 outer diameter of sleeve are 1.4:1 in the present embodiment；4 inner hole of locating support
The lesser one end of diameter is connect with sleeve 1, the internal diameter of the smaller one end of 4 diameter of bore of locating support compared with sleeve 1 outer diameter about
5mm is equipped with force-transmitting pole 2 in sleeve 1；Be provided with ring flange on the excircle of the larger one end of 4 diameter of bore of locating support, and with pad
Plate 6 connects, and positions by the central boss on backing plate 6, the internal diameter of the larger one end of 4 diameter of bore of locating support is compared with 6 center of backing plate
The outer diameter of boss about 5mm, the height of the larger one end of 4 diameter of bore of locating support are being determined compared with the high 1.5cm of height of sensor 5
The side wall of position larger one end of 4 diameter of bore of bracket is provided with the cable-through hole 4-1 that 1 diameter is about 2cm；The backing plate 6 is in
The plectane of cardiac prominence platform is machined with 1 circular groove at the center of central boss, is circumferentially evenly arranged with 4 directly along 6 outer circle of backing plate
The location hole 6-1 of diameter about 2cm；Locating plate 3 is installed at the boss inside locating support 4, locating plate 3 is with central circular
The steel disk of groove, the outer diameter of locating plate 3 is compared with the small 0.5mm of internal diameter at 4 internal boss of locating support；During locating plate 3 has
One end of heart circular groove is connect with force-transmitting pole 2, the internal diameter of 3 central circular groove of locating plate compared with force-transmitting pole outer diameter about
0.5mm, the other end and sensor 5 of locating plate 3 are in close contact, and the other end of sensor 5 is installed on the circular groove of backing plate 6
It is interior, the big 0.5mm of outer diameter of the internal diameter of 6 circular groove of backing plate compared with sensor 5；The sensor 5 is according to pressure actual when using
Selecting model and range, the present embodiment selects homemade steel circular cylindrical strain gauge transducer, diameter 40mm, height 80mm,
Range selects 0-1000MPa.
The locating support 4 is the internal variable diameter steel cylinder body for having boss, 4 diameter of bore of locating support lesser one
End is connect with sleeve 1, and the ratio between outer diameter and 1 outer diameter of sleeve of locating support 4 are 1.4:1；The larger one end of 4 diameter of bore of locating support
Excircle on be provided with ring flange, and connect with backing plate 6, and positioned by the central boss of backing plate 6,4 inner hole of locating support is straight
The internal diameter of the larger one end of diameter compared with 6 central boss of backing plate outer diameter about 5mm, highly compared with the high 1.5cm of height of sensor 5, this reality
It applies in example, the height of sensor is 80mm, therefore the height of the larger one end of 4 diameter of bore of locating support is 81.5mm, in positioning branch
4 side wall of frame is provided with the cable-through hole 4-1 that 1 diameter is about 2cm, for drawing the conducting wire of sensor 5.
The backing plate 6 is the steel plectane with central boss, and the ratio between the height of central boss and the total height of backing plate 6 are
1:3, the outer diameter of central boss are processed compared with the small 5mm of internal diameter of the larger one end of 4 diameter of bore of locating support at the center of central boss
There is 1 each circular groove, the ratio between depth and the total height of backing plate 6 of circular groove are about 1:1.5, and the internal diameter of circular groove relatively senses
The big 0.5mm of the outer diameter of device 5 is circumferentially evenly arranged with the location hole 6-1 of 4 diameter about 2cm along 6 outer circle of backing plate, is used for backing plate 6
It is fixed in sample platform.
The locating plate 3 is the steel disk with central circular groove, inside the height of locating plate 3 and locating support 4
The ratio between height of boss is 2:1, the small 0.5mm of internal diameter of the outer diameter of locating plate 3 compared with 4 internal boss of locating support；Locating plate 3 has
One end of central circular groove is connect with force-transmitting pole 2, the internal diameter of 3 central circular groove of locating plate compared with force-transmitting pole outer diameter about
0.5mm, the other end and sensor 5 of locating plate 3 are in close contact.
Application method and working principle of the invention is as follows: by the location hole 6-1 on backing plate 6 that backing plate 6 is fixed first
In on test platform；Second, sensor 5 is placed in the circular groove of backing plate 6；Locating support 4 is installed on backing plate 6 by third
On, and positioned by the central boss of backing plate 6, the conducting wire of sensor 5 is drawn by the cable-through hole 4-1 on locating support 4；The
Four, locating plate 3 is installed at the boss inside locating support 4, and be in close contact with the end face of sensor 5；Finally by sleeve 1
The lesser one end of 4 internal diameter of locating support is installed, force-transmitting pole 2 is by the central circular groove positioning on locating plate 3, sleeve 1, power transmission
Column 2,6 coaxial line of locating plate 3, sensor 5 and backing plate.When the object quickly moved hits the explosive loading in sleeve 1, explosive
Powder charge institute is loaded to be transmitted on sensor 5 by force-transmitting pole 2, and then is recorded it by sensor 5 and responded stress, in this process
In, even if sensor 5 is radially expanded, because of no radial constraint, therefore it can be easily removed and reuse；During loading,
Each component is accurately positioned by location hole, groove or boss, it is ensured that sensor 5 keeps good with the force-transmitting pole 2 in sleeve 1
Coaxial line, and can prevent sleeve 1 is unexpected during loading to topple over.
Explosive loading of the invention responds stress test sensor locator, on the one hand which can guarantee
Sensor 5 takes out after the load that experiences a shock and recycling；On the other hand it can ensure sensor 5 and sleeve 1, especially
It is that force-transmitting pole 2 in sleeve 1 keeps good coaxial line, and can prevent sleeve 1 is unexpected during loading to topple over, it can be for just
Prompt, accurate measurement explosive loading response stress provides technical support.
Claims (4)
1. a kind of explosive loading responds stress test sensor locator, including locating support (4), locating plate (3), backing plate
(6), which is characterized in that further include sleeve (1), force-transmitting pole (2) and sensor (5), wherein locating support (4) has for inside
The variable diameter steel cylinder body of boss, the ratio between outer diameter and the outer diameter of sleeve (1) of locating support (4) are 1.3~1.5:1, positioning branch
Frame (4) lesser one end of diameter of bore is connect with sleeve (1), is equipped with force-transmitting pole (2) in sleeve (1)；Locating support (4) inner hole
The side wall for being relatively large in diameter one end is provided with cable-through hole (4-1), is machined on the excircle of locating support (4) larger one end of diameter of bore
Ring flange, and connect with backing plate (6), it is positioned by the central boss on backing plate (6)；Backing plate (6) is the circle with central boss
Plate, the center of boss is machined with circular groove in its center, the total heights of the height of backing plate (6) central boss and backing plate (6) it
Than for 1:3~4, the ratio between depth and the total height of backing plate (6) of backing plate (6) circular groove are 1:1.5~2, along backing plate (6) outer circle
Circumferentially it is evenly arranged with location hole (6-1)；It is equipped with locating plate (3) at locating support (4) internal boss, locating plate (3) is band
There is the steel disk of central circular groove, the ratio between height and the height of locating support (4) internal boss of locating plate (3) are 1:2
~3, locating plate (3) is connect with one end of central circular groove with force-transmitting pole (2), and the other end and sensor (5) are in close contact,
The other end of sensor (5) is installed in the circular groove of backing plate (6).
2. explosive loading as described in claim 1 responds stress test sensor locator, which is characterized in that the positioning
The height of bracket (4) larger one end of diameter of bore compared with sensor (5) the high 1~2cm of height, locating support (4) diameter of bore compared with
The outer diameter big 4-6mm of the internal diameter compared with backing plate (6) central boss of big one end, the internal diameter of locating support (4) smaller one end of diameter of bore
Compared with the big 4~6mm of outer diameter of sleeve (1).
3. explosive loading as described in claim 1 responds stress test sensor locator, which is characterized in that the backing plate
(6) outer diameter big 0.5~1mm of the internal diameter of circular groove compared with sensor (5).
4. explosive loading as described in claim 1 responds stress test sensor locator, which is characterized in that locating plate
(3) outer diameter is compared with the small 0.5~1mm of internal diameter at locating support (4) internal boss, the internal diameter of locating plate (3) central circular groove
Compared with the big 0.5~1mm of outer diameter of force-transmitting pole (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710197631.0A CN106989986B (en) | 2017-03-29 | 2017-03-29 | Explosive loading responds stress test sensor locator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710197631.0A CN106989986B (en) | 2017-03-29 | 2017-03-29 | Explosive loading responds stress test sensor locator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106989986A CN106989986A (en) | 2017-07-28 |
| CN106989986B true CN106989986B (en) | 2019-06-28 |
Family
ID=59413040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710197631.0A Expired - Fee Related CN106989986B (en) | 2017-03-29 | 2017-03-29 | Explosive loading responds stress test sensor locator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106989986B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489804A (en) * | 2018-04-28 | 2018-09-04 | 四川大学 | MTS pilot system high-temperature high pressure sensor the service of connection devices |
| CN109187913B (en) * | 2018-08-28 | 2021-05-18 | 西安近代化学研究所 | Simple testing device for cylinder test |
| CN108801578B (en) * | 2018-08-28 | 2020-07-17 | 西安近代化学研究所 | Drop model experimental device |
| CN109490106B (en) * | 2018-11-19 | 2021-05-18 | 西安近代化学研究所 | Device for measuring stress of end face of explosive column under low-speed impact loading |
| CN110530787B (en) * | 2019-09-05 | 2022-05-24 | 西安近代化学研究所 | Explosive stress testing device based on multiple pulse tests |
| CN111122174A (en) * | 2019-12-13 | 2020-05-08 | 南京理工大学 | Vertical motion type explosion impact test testing device |
| CN112577849B (en) * | 2020-12-14 | 2023-03-17 | 西安近代化学研究所 | Explosive isothermal thermal decomposition pressure measuring device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203275213U (en) * | 2013-05-20 | 2013-11-06 | 洛阳理工学院 | Portable confining pressure loading device |
| CN104535439A (en) * | 2015-01-09 | 2015-04-22 | 西安近代化学研究所 | Double-pulse-load loading test device |
| CN106018464A (en) * | 2016-05-13 | 2016-10-12 | 西安近代化学研究所 | Explosive loading and penetrating stability evaluation method based on equivalent model experiment |
-
2017
- 2017-03-29 CN CN201710197631.0A patent/CN106989986B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203275213U (en) * | 2013-05-20 | 2013-11-06 | 洛阳理工学院 | Portable confining pressure loading device |
| CN104535439A (en) * | 2015-01-09 | 2015-04-22 | 西安近代化学研究所 | Double-pulse-load loading test device |
| CN106018464A (en) * | 2016-05-13 | 2016-10-12 | 西安近代化学研究所 | Explosive loading and penetrating stability evaluation method based on equivalent model experiment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106989986A (en) | 2017-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106989986B (en) | Explosive loading responds stress test sensor locator | |
| CN105910909B (en) | The double annulus uniaxial direct tensile Tensile Strength of Rock testing machines of more diameter cores | |
| CN103900902A (en) | Laterally constrained rock uniaxial compression test device | |
| CN201212847Y (en) | Static balancing detector for large non-shaft gravity force self-centering revolving body | |
| CN103245520A (en) | Testing device for condition simulated numerical control rotary table test bed | |
| CN108627065A (en) | A kind of braking disc detector | |
| CN110082222A (en) | Split type three-dimensional pressure device and strain waveform figure acquisition method | |
| CN207335994U (en) | Pressure-bearing end cap flange dynamic sealing performance detection device | |
| CN103323239B (en) | Oscillating bearing detection device | |
| CN103760015B (en) | A kind of autonavigator for compressive fatigue test | |
| CN110501238A (en) | A kind of static breaking agent hyrate testing device for shear strength and method | |
| CN109059717A (en) | A kind of radial hole location tolerance detection device of elevator traction machine braked wheel | |
| CN108548475A (en) | A kind of end-play survey tool of angular contact ball bearing | |
| CN107389457A (en) | Rock mechanics experiment machine based on carbon fiber balancing gate pit | |
| CN202216938U (en) | Rock triaxial compression acoustic emission testing system | |
| CN205981686U (en) | Wheel hub bearing rigid test machine | |
| CN203365157U (en) | Testing device for condition simulated numerical control rotary table test bed | |
| CN102620872B (en) | Sensor for measuring rotary machining torque and axial force | |
| CN209123872U (en) | The device of dynamic monitoring deformation index under a kind of high-temperature and high-pressure conditions in reaction kettle | |
| CN207528417U (en) | A kind of spindle vibration tester | |
| CN103983175A (en) | Outer cone detector | |
| Liu et al. | A new testing method for the characterization of the tension-compression cyclic behavior of rock salt | |
| CN206803993U (en) | The self-operated measuring unit of electromagnet deflection in common-rail injector | |
| CN203465168U (en) | Hardness testing device for rope | |
| CN106018266A (en) | Rock expansion test device |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190628 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |