CN104374361A - Plate creep extensometer - Google Patents
Plate creep extensometer Download PDFInfo
- Publication number
- CN104374361A CN104374361A CN201310346788.7A CN201310346788A CN104374361A CN 104374361 A CN104374361 A CN 104374361A CN 201310346788 A CN201310346788 A CN 201310346788A CN 104374361 A CN104374361 A CN 104374361A
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- Prior art keywords
- extensometer
- bar
- clamping
- extensometer frame
- trepanning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a mechanical creep extensometer, and aims to provide a novel extensometer which can clamp plate samples with different thicknesses and different gauge lengths. The technical scheme is characterized in that the extensometer is provided with two opposite cuboid-shaped notches on the conical surfaces of the inner sides of clamping trepanning of sleeve ring chucks of an upper extensometer frame and a lower extensometer frame respectively, and a plate sample passes through the clamping trepanning; 5 extensometer gauge length adjusting screw holes are respectively arranged on the two upper extension rods, are used for adjusting the position of a range adjusting screw positioning support to adjust the gauge length of the extensometer, and can clamp plate samples with the gauge length of 20 mm-100 mm; cross-shaped groove plate sample clamping cushion blocks with different sizes are designed, and plate samples with the thickness of 0.5-4 mm can be clamped by replacing the plate sample clamping cushion blocks; the extensometer adopts DZ22 or DD3 and DD6 materials, and can be used for creep tests at all temperatures below 1200 ℃. The extensometer can be used on test equipment of different models, and has good universality.
Description
Technical field
The present invention relates to a kind of deformation measuring device for the performance test of metal material Creep Mechanics, belong to test apparatus field.
Background technology
Metal material creep test is a kind of high temperature tension test carried out under steady temperature permanent load.Extensometer is an indispensable part in the test of metal material Creep Mechanics performance test.The test of metal material creep test generally selects bar sample to carry out Creep Mechanics performance test, along with the development of material science, carries out creep test can not meet design of material user demand with bar sample.Many metal materials need the Creep Mechanics performance test data using sheet coupon in the middle of design uses.Present Domestic creep test is tested the extensometer used and is generally all used bar creep extensometer, it is all the measurement that a kind of extensometer of the special a kind of specification of bar sample of specification carries out the deformation of creep, be not specifically designed to the creep extensometer of different size sheet coupon test, carry out experimental test with existing bar creep extensometer and can not meet design of material user demand.And the serviceability temperature of bar creep extensometer that Present Domestic uses is general all below 1100 DEG C, can not meet metallic high temperature testing of materials temperature the testing requirement of 1100 DEG C ~ 1200 DEG C.
Summary of the invention
The object of the invention is to the demand for the performance test of sheet coupon Creep Mechanics, design provides a kind of creep extensometer for the performance test of sheet metal material sample Creep Mechanics.The design of this extensometer is considered and by the design to extensometer shelf structure, is achieved the multi-functional use of one pair of extensometer by the sheet coupon having different-thickness and different gauge length specification in actual tests test.By designing the sheet coupon clamping cushion block of different size, by the method changing sheet coupon clamping cushion block, one pair of extensometer achieves the creep test test that thickness is the sheet coupon of 0.5mm ~ 4mm; By the method for adjustment extensometer gage length length, one pair of extensometer achieves the creep test test that gauge length is 20mm ~ 100mm sheet coupon; In order to meet 1200 DEG C of superhigh temperature creep test testing requirements, the selection of material of extensometer frame is strengthened, select heat-resisting quantity and the more excellent high temperature alloy of antioxygenic property, select directed high temperature alloy DZ22 or single crystal super alloy DD3, DD6, can be used for all creep test tests of less than 1200 DEG C.And this extensometer can be general on the testing equipment of different model.
The object of the invention is to be realized by following technical measures:
This is extended and counts mechanical type creep extensometer, adopt the mode of contact type measurement, its structural design features is, this extensometer is by upper extensometer frame, as shown in Figure 2, lower extensometer frame, as shown in Figure 3, deformation measurement sensor, sheet coupon clamping cushion block and spring composition.Upper extensometer frame is made up of collar chuck, upper extensometer bar, range set screw, set nut, range set screw locating support, pin, ball-collecting rack, steel ball and screw.In the middle of upper extensometer frame collar chuck, there is a clamping trepanning in taper, the inner side conical surface of clamping trepanning has two relative rectangular parallelepiped gap, gap width 4.5mm; Process the rectangular parallelepiped gap of bar that two positioning weldings extend in the outside of upper extensometer frame collar chuck, this gap and clamping trepanning inboard cone face rectangular parallelepiped gap are on one wire; Two geomeries identical on extend one end bar of bar be welded in two rectangular parallelepiped gap outside extensometer frame collar chuck, bar that two are extended is welded in extensometer frame collar chuck and bar of extending on two is parallel to each other; Two to be extended the other end of bar, be that interval processes 5 tapped extensometer gage lengths adjustment screws successively with 20mm, select wherein two relative screw screws that a range set screw locating support is respectively installed, by regulating range set screw locating support 5 extensometer gage lengths on upper bar of extending to regulate the different relative positions of screw to make the gauge length of extensometer mate with sample marking distance, meet the test of 20mm ~ 100mm gauge length sheet coupon; On two range set screw locating supports, each installation range set screw, each range set screw is provided with a set nut; On two range set screw locating supports near on to extend the position of bar, each processing through hole, and respectively in through-holes fix a pin, and two pins respectively with close on bar of extending vertical; The ball-collecting rack of a band taper keyway is respectively installed at two the are extended back side of bar being installed range set screw locating support, respectively in taper keyway places a rotatable steel ball.Lower extensometer frame is made up of collar chuck, lower extensometer bar, deformation measurement sensor holders locating support, deformation measurement sensor, ball-collecting rack, steel ball and screw.The face shaping of lower extensometer frame collar chuck is identical with upper extensometer frame collar chuck, and the size of rectangular-shaped gap is identical with upper extensometer frame collar chuck on the geomery of clamping trepanning in taper in the middle of lower extensometer collar chuck and clamping trepanning inboard cone face, lower extensometer frame collar chuck physical dimension is less than upper extensometer frame, the geomery of bar of extending under two is identical, and bar of extending under two is identical with upper extensometer frame with the positioning welding mode of lower extensometer frame collar chuck; Two deformation measurement sensor holders locating supports are welded in extend under two outside of the bar other end, the ball-collecting rack of a band taper keyway is respectively installed at extend under two back side of bar welding deformation survey sensor clamping position support, respectively in taper keyway places a rotatable steel ball.Outside sheet coupon clamping cushion block, semi circular surface is the conical surface in half round table-like sheet coupon clamping cushion block to devise one, and its tapering is consistent with the tapering in clamping trepanning inboard cone face in the middle of collar chuck; Just a cross recess is processed on the diameter end face of semi circular surface outside sheet coupon clamping cushion block, consistent with the groove size of diameter end face vertical direction and sample thickness, be 0.5 ~ 4mm.During clamping sample, select the sheet coupon clamping cushion block with sheet coupon thickness matching, on the lug that the cross recess of each two boards material specimen clamping cushion block is sandwiched in sheet coupon top and on the bottom lug of sheet coupon, clamping trepanning on upper extensometer frame and lower extensometer frame collar chuck is sandwiched on the taper round platform that the two boards material specimen clamping cushion block on sheet coupon top lug and bottom lug is butted into respectively, and keeps closely cooperating; By changing sheet coupon clamping cushion block, can clamping thickness be the sheet coupon of 0.5mm ~ 4mm.
The present invention has simple to operate, and clamping is efficient and convenient, can carry out the performance test of less than 1200 DEG C various metal material Creep Mechanics; Extensometer gage length is adjustable, can test the sheet coupon that gauge length is 20mm ~ 100mm; The sheet coupon that thickness is 0.5mm ~ 4mm can be tested; Can use on the creep testing machine of different model, versatility is good.
Accompanying drawing explanation
Fig. 1 is sheet material extensometer specimen clamping structure figure and partial sectional view
Fig. 2 is upper extensometer shelf structure figure
Fig. 3 is lower extensometer shelf structure figure
Fig. 4 is sheet coupon clamping cushion block
Fig. 5 on to extend bar
Fig. 6 is range set screw locating support
Fig. 7 extends under being bar
Fig. 8 is ball-collecting rack and steel ball
Fig. 9 is sheet coupon
In figure: fixture on 1, 2 sheet coupon clamping cushion blocks, extensometer frame on 3, 4 times extensometer framves, 5 lower clamps, 6 springs, 7 deformation measurement transducer range expansion links, 8 deformation measurement sensors, 9 sheet coupons, to extend on 10 bar, 11 range set screw, 12 set nuts, 13 range set screw locating supports, 14 steel balls, 15 ball-collecting racks, 16 pins, the rectangular parallelepiped gap of clamping trepanning on extensometer frame collar chuck on 17, extensometer frame collar chuck on 18, clamping trepanning on 19 on extensometer frame collar chuck, 20 times bars of extending, 21 times extensometer frame collar chucks, the rectangular parallelepiped gap of clamping trepanning on 22 times extensometer frame collar chucks, 23 deformation measurement sensor holders locating supports, 24 screws, clamping trepanning on 25 times extensometer frame collar chucks, 26 cross recess, 27 extensometer gage lengths regulate screw, to extend on 28 bar ball-collecting rack fixing threaded hole, 29 range set screw lift adjustment screws, 30 range set screw locating support fixing threaded holes, 31 pin fixed orifices, to extend for 32 times bar ball-collecting rack fixed orifice, 33 taper keyways, 34 top lugs, 35 bottom lugs
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
Shown in accompanying drawing 1 ~ 9, this extensometer is made up of upper extensometer frame 3, lower extensometer frame 4, deformation measurement sensor 8, sheet coupon clamping cushion block 2 and spring 6.Before the test, first extend in two rectangular parallelepiped gap of bar 10 positioning welding outside upper extensometer frame collar chuck 18 on measure-alike for two present situations, two range set screw locating supports 13 extensometer gage length that screw is individually fixed in outside bar that two extended regulates screw 27, and the position of two range set screw locating supports 13 is just relative; Each installation inverted range set screw 11 on two range set screw locating supports 13, and in each range set screw 11, a set nut 12 is installed; On two range set screw locating supports 13 near on the extend position of bar 10 respectively process a through hole, and respectively in through-holes fix a pin 16, and two pins 16 respectively with close on bar 10 of extending vertical; The ball-collecting rack 15 of a band taper keyway 33 is respectively installed at two the are extended back side of bar 10 being installed range set screw locating support 13, and respectively in taper keyway 33 places a rotatable steel ball 14, extensometer frame 3 on composition.Bar 20 will be extended under identical for two geomeries in the same way in the rectangular parallelepiped gap of positioning welding outside lower extensometer frame collar chuck 21, a deformation measurement sensor holders locating support 23 is welded in extend under two outside of bar 20 other end respectively, the position of two deformation measurement sensor holders locating supports 23 is just relative, the center line in the deformation measurement sensor holders hole on each deformation measurement sensor holders locating support 23 with connected under bar 20 of extending parallel; The ball-collecting rack 15 of a band taper keyway 33 is respectively installed at extend under two back side of bar 20 being installed deformation measurement sensor holders locating support 23, and respectively in taper keyway 33 places a rotatable steel ball 14, the lower extensometer frame 4 of composition.When clamping is tested, first the screw 24 on deformation measurement sensor holders locating support 23 screws in screw, with screw, be connected with testing machine two deformation measurement sensors 8 are held on deformation measurement sensor holders locating support 23, the length direction of deformation measurement sensor 8 with under bar 20 of extending parallel, with pin, one end of sheet coupon 9 is fixed on lower clamp 5, select the sheet coupon clamping cushion block 2 of cross recess 26 size and sheet coupon 9 thickness matching, two lugs 35 being clipped in sheet coupon 9 bottom with the cross recess 26 of two boards material specimen clamping cushion block 2 are butted into taper round platform, the top of sheet coupon 9 is enclosed within sheet coupon 9 through the rectangular parallelepiped gap 22 of clamping trepanning on lower extensometer frame collar chuck, lower extensometer frame 4 being moved to lug 35 position, sheet coupon 9 bottom is enclosed within the taper round platform that the two boards material specimen clamping cushion block 2 on the lug 35 of two, sheet coupon 9 bottom is butted into, closely cooperate, on the rolling steel ball 14 of extending under two inside bar 20 on ball-collecting rack 15 and lower link two be parallel under to extend the plane contact of bar 20.Be clipped on the lug 34 of two, sheet coupon 9 top with the cross recess 25 of two boards material specimen clamping cushion block 2 and be butted into taper round platform, sheet coupon 9 top is enclosed within sheet coupon 9 through the rectangular parallelepiped gap 17 of clamping trepanning on upper extensometer frame collar chuck, upper extensometer frame 3 is moved to lug 34 position, sheet coupon 9 top to be enclosed within the taper round platform that the two boards material specimen clamping cushion block 2 on sheet coupon 9 top lug 34 is butted into, closely cooperate; By changing sheet coupon clamping cushion block 2, can clamping thickness be the sheet coupon 9 of 0.5mm ~ 4mm.Two are extended and bar 10 selects two relative extensometer gage lengths regulate screw 27 screw that a range set screw locating support 13 is respectively installed, by regulating range set screw locating support 13 5 extensometer gage lengths on upper bar 10 of extending to regulate the different relative positions of screw 27 to make the gauge length of extensometer mate with sample marking distance, meet the test of 20mm ~ 100mm gauge length sample; The termination of two range set screw 11 is docked with the termination of the range expansion link 7 of two deformation measurement sensors 8 respectively, the adjustable height of two range set screw 11 is regulated to make the range expansion link 7 of two deformation measurement sensors 8 be in compressive state, the range measured of two deformation measurement sensors 8 is made to be adjusted within the scope of the deformation measurement of testing requirements, lock the length of range set screw 11 again with set nut 12, prevent the accuracy producing moving influence deformation of creep measurement in process of the test; Rolling steel ball 14 inside upper extensometer frame 3 on ball-collecting rack 15 respectively with close under bar 20 of extending contact, ball-collecting rack 15 and steel ball 14 make to extend bar 10 with under bar 20 of extending spaced apart and be parallel to each other, steel ball 14 reduce extend bar 10 and under the contact area of extending between bar 20, the frictional resistance of upper extensometer frame 3 and the relative displacement of lower extensometer frame 4 when reducing sample deformation in process of the test; With two springs 6, the two ends of pin 16 on range set screw locating support 13 are coupled together, make to extend bar 10 and under extend bar 20 and under to extend close contact between bar 20 and lower link, prevent extensometer in process of the test from departing from testing machine draw-bar pull center, finally with pin, upper fixture 1 is fixed on sheet coupon 9 top.
Claims (8)
1. a sheet material creep extensometer, its architectural feature is, it is made up of upper extensometer frame, lower extensometer frame, deformation measurement sensor, sheet coupon clamping cushion block and spring.
2. upper extensometer frame according to claim 1, is characterized in that, upper extensometer frame by collar chuck, on extend bar, range set screw locating support, range set screw, set nut, pin, ball-collecting rack, steel ball and screw form.In the middle of upper extensometer frame collar chuck, there is the clamping trepanning of a taper, clamping trepanning inboard cone face has the rectangular-shaped gap that two relative, gap width 4.5mm, for sheet coupon through clamping trepanning, two are extended in one end positioning welding of bar two rectangular parallelepiped gap outside upper extensometer frame collar chuck, two to be extended the other end of bar, be that interval processes 5 tapped screws successively with 20mm, 5 extensometer gage lengths on bar that optional two are extended regulate two screws relative in screws, being fixed on two by installation range set screw locating support with screw extends on bar, the different relative positions of screws are regulated to regulate the gauge length of extensometer by regulating range set screw locating support 5 extensometer gage lengths on bar of extending on two, the gauge length of extensometer is mated with sample marking distance, meet the test of 20mm ~ 100mm gauge length sheet coupon, on two range set screw locating supports near on to extend the position of bar, each fix one with close on to extend the vertical pin of bar, with two springs, the two ends of pin on two range set screw locating supports are coupled together, prevent extensometer in process of the test from departing from testing machine draw-bar pull center, the ball-collecting rack of a band taper keyway is respectively installed at two the are extended back side of bar being installed range set screw locating support, each placement rotatable steel ball in taper keyway, ball-collecting rack and steel ball make to extend bar with under bar of extending spaced apart and be parallel to each other, steel ball reduce extend bar and under the contact area of extending between bar, the frictional resistance of upper extensometer frame and the relative displacement of lower extensometer frame when reducing sample deformation in process of the test, the geomery of bar that two are extended is identical, the geomery of two range set screw locating supports is identical, the geomery of two range set screw is identical.
3. lower extensometer frame according to claim 1 by collar chuck, under extend bar, deformation measurement sensor holders locating support, deformation measurement sensor, ball-collecting rack, steel ball and screw form.In the middle of lower extensometer frame collar chuck, there is the clamping trepanning of a taper, clamping trepanning inboard cone face has the rectangular-shaped gap that two relative, gap width 4.5mm, for sheet coupon through clamping trepanning; Extend in one end positioning welding of bar two rectangular parallelepiped gap outside lower extensometer frame collar chuck under two, the other end of bar of extending under two welds two deformation measurement sensor holders locating supports, on deformation measurement sensor holders locating support deformation measurement sensor holders hole center line with connected under bar of extending parallel; The ball-collecting rack of a band cone keyway is respectively installed, each placement rotatable steel ball in cone keyway at the back side of two deformation measurement sensor holders locating supports.The geomery of bar that two are extended is identical; The geomery of two deformation measurement sensor holders locating supports is identical.
4. sheet coupon clamping cushion block according to claim 1, it is characterized in that, devise one in half round table-like sheet coupon clamping cushion block, outside sheet coupon clamping cushion block, semi circular surface is the conical surface, its tapering is consistent with the tapering of the conical surface inside clamping trepanning in the middle of upper and lower extensometer frame collar chuck, just a cross recess is processed on the diameter end face of semi circular surface outside sheet coupon clamping cushion block, consistent with the groove size of diameter end face vertical direction and sample thickness, be 0.5mm ~ 4mm.During clamping sample, the lug being sandwiched in sheet coupon upper and lower respectively with the cross recess of two boards material specimen clamping cushion block is butted into taper round platform, clamping trepanning in the middle of collar chuck is sandwiched in two boards material specimen clamping cushion block and is butted on taper round platform, and keeps closely cooperating.By changing sheet coupon clamping cushion block, can clamping thickness be the sheet coupon of 0.5mm ~ 4mm.
5. upper extensometer frame according to claim 1, lower extensometer frame, is characterized in that, the directed high temperature alloy DZ22 of material selection of upper extensometer frame and lower extensometer frame or single crystal super alloy DD3, DD6.
6. the upper extensometer frame according to Claims 2 or 3, lower extensometer frame, is characterized in that, the face shaping of upper extensometer frame collar chuck is identical with lower extensometer frame collar chuck, and lower extensometer frame collar chuck physical dimension is less than upper extensometer frame; Mounting clip sleeve hole shape size in the middle of upper extensometer frame collar chuck is identical with the clamping trepanning in the middle of lower extensometer frame collar chuck; On extend ball-collecting rack that bar is installed and steel ball geomery with under extend ball-collecting rack that bar is installed and steel ball geomery identical; Bar that two are extended is identical with lower extensometer frame with the positioning welding mode of upper extensometer frame collar chuck; The geomery of bar of extending under two is identical.
7. range set screw and deformation measurement sensor according to Claims 2 or 3, it is characterized in that, the center of range set screw and deformation measurement sensor on one wire.
8. the center line of the clamping trepanning on the center line of the clamping trepanning on upper extensometer frame collar chuck according to Claims 2 or 3 and lower extensometer frame collar chuck and the center line of sample are on one wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310346788.7A CN104374361B (en) | 2013-08-12 | 2013-08-12 | Plate creep extensometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310346788.7A CN104374361B (en) | 2013-08-12 | 2013-08-12 | Plate creep extensometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104374361A true CN104374361A (en) | 2015-02-25 |
| CN104374361B CN104374361B (en) | 2017-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310346788.7A Active CN104374361B (en) | 2013-08-12 | 2013-08-12 | Plate creep extensometer |
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| CN (1) | CN104374361B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644700A (en) * | 2016-11-18 | 2017-05-10 | 西北工业大学 | Small sample fixture for creepage of plate high-temperature alloy |
| CN106908377A (en) * | 2017-04-18 | 2017-06-30 | 沈阳航空航天大学 | A kind of pre-etching experiment sample mount |
| CN110823682A (en) * | 2019-11-01 | 2020-02-21 | 湘潭大学 | Clamp for ultrahigh-temperature creep test |
| CN112763342A (en) * | 2020-12-30 | 2021-05-07 | 中航试金石检测科技(大厂)有限公司 | Composite material high-temperature compression tool and tensile testing machine |
| CN113358460A (en) * | 2021-06-02 | 2021-09-07 | 上海发电设备成套设计研究院有限责任公司 | Axial high-temperature creep test fixture and equipment |
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| CN103115603A (en) * | 2013-01-24 | 2013-05-22 | 中国科学院力学研究所 | Device and method for measuring biaxial strain in material stretch and torsion test |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644700A (en) * | 2016-11-18 | 2017-05-10 | 西北工业大学 | Small sample fixture for creepage of plate high-temperature alloy |
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| CN106908377B (en) * | 2017-04-18 | 2023-09-26 | 沈阳航空航天大学 | Sample support for pre-corrosion test |
| CN110823682A (en) * | 2019-11-01 | 2020-02-21 | 湘潭大学 | Clamp for ultrahigh-temperature creep test |
| CN112763342A (en) * | 2020-12-30 | 2021-05-07 | 中航试金石检测科技(大厂)有限公司 | Composite material high-temperature compression tool and tensile testing machine |
| CN112763342B (en) * | 2020-12-30 | 2022-08-02 | 中航试金石检测科技(大厂)有限公司 | Composite material high-temperature compression tool and tensile testing machine |
| CN113358460A (en) * | 2021-06-02 | 2021-09-07 | 上海发电设备成套设计研究院有限责任公司 | Axial high-temperature creep test fixture and equipment |
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|---|---|
| CN104374361B (en) | 2017-06-09 |
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Effective date of registration: 20220428 Address after: 065300 Chaobai River Economic Development Zone, Dachang Hui Autonomous County, Langfang City, Hebei Province Patentee after: AVIC touchstone Testing Technology (Dachang) Co.,Ltd. Address before: 102200 east of hengqiao village, machikou Town, Changping District, Beijing Patentee before: AVIC SHIJINSHI TESTING TECHNOLOGY Co.,Ltd. |