CN104266851A - Device for connecting airtight test vehicle body with airtight test bed box - Google Patents
Device for connecting airtight test vehicle body with airtight test bed box Download PDFInfo
- Publication number
- CN104266851A CN104266851A CN201410539362.8A CN201410539362A CN104266851A CN 104266851 A CN104266851 A CN 104266851A CN 201410539362 A CN201410539362 A CN 201410539362A CN 104266851 A CN104266851 A CN 104266851A
- Authority
- CN
- China
- Prior art keywords
- tightness test
- joint flange
- car body
- test platform
- transition
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/08—Railway vehicles
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention relates to the technical field of railway vehicle body tests, and particularly discloses a device for connecting an airtight test vehicle body with an airtight test bed box. The device comprises a transition body, a vehicle body connecting flange, a box connecting flange, an air exhausting opening connecting flange and an air charging opening connecting flange. The transition body is in a channel shape, and a middle plate is arranged in the transition body and provided with a small sealing door. The vehicle body connecting flange is arranged at one end of the transition body and used for being connected with the end of the airtight test vehicle body. The box connecting flange is arranged at the other end of the transition body and used for being connected with the portion of a large door of the airtight test bed box. The air exhausting opening connecting flange is arranged in the middle of the transition body and used for being connected with an air exhausting opening of an airtight test bed. The air charging opening connecting flange is arranged in the middle of the transition body and used for being connected with an air charging opening of the airtight test bed. By means of the device, internal loading and external loading are carried out on the test vehicle body at the same time; in addition, only when the external loading is carried out on the test vehicle body, a person can enter the test vehicle body through the small sealing door in the transition body for inspecting.
Description
Technical field
The present invention relates to vehicle body of railway vehicle experimental technique field, particularly relate to a kind of tightness test car body and tightness test platform box body connector.
Background technology
Along with the fast development of track traffic, the overall trip speed of domestic motor train unit is the highest has reached 380 kilometers/hour.Because the travelling speed of motor train unit is higher, when vehicle crosses, larger air pressure change can be produced, vehicle is made to occur significantly inclining pendulum phenomenon, when particularly vehicle crosses in tunnel, the change of air pressure is larger, directly affects structural strength and the serviceable life of carbody.Therefore, before vehicle puts into effect, need to carry out tightness test, to examine the intensity of car body by devices such as tightness test platforms to test car body.
In prior art when carrying out tightness test by tightness test platform to test car body, inside and outside loading can not be carried out to test car body simultaneously, and when external load is carried out to test car body, test car body cannot be entered and check.
Summary of the invention
(1) technical matters that will solve
The object of this invention is to provide a kind of tightness test car body and tightness test platform box body connector, with overcome in prior art by tightness test platform to test car body carry out tightness test time, car body cannot be tested to formula and carry out inside and outside loading simultaneously, and to test car body carry out external load time cannot enter test car body carry out the problem such as checking.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of tightness test car body and tightness test platform box body connector, comprising:
Transition body, described transition body is passage shape, and be provided with the intermediate plate blocked described transition body inner space in described transition body, described intermediate plate is provided with sealing wicket;
Car body joint flange, described car body joint flange is located at one end of described transition body, for connecting the end of tightness test car body;
Casing joint flange, described casing joint flange is located at the other end of described transition body, for connecting the gate place of tightness test platform casing;
Bleeding point joint flange, described bleeding point joint flange is located at the middle part of described transition body and is positioned at the side of described intermediate plate near described car body joint flange, for being connected the bleeding point of tightness test platform by pipeline;
Inflation inlet joint flange, described inflation inlet joint flange is located at the middle part of described transition body and is positioned at the side of described intermediate plate near described car body joint flange, for being connected the inflation inlet of tightness test platform by pipeline.
Preferably, described tightness test car body and tightness test platform box body connector also comprise supporting mechanism, and described supporting mechanism is located at the bottom of described transition body.
Preferably, described supporting mechanism is supporting trolley.
Preferably, elevating mechanism is provided with between described transition body and described supporting trolley.
Preferably, described elevating mechanism comprises multiple hydraulic cylinder.
Preferably, the edge of described sealing wicket is provided with air bag.
Preferably, described car body joint flange, casing joint flange, bleeding point joint flange and inflation inlet joint flange are all connected and sealed by the appropriate section of bolt and tightness test platform.
Preferably, described car body joint flange, casing joint flange, bleeding point joint flange and inflation inlet joint flange are all connected with described transition body by the mode of welding.
Preferably, described transition body is right cylinder passage shape.
(3) beneficial effect
Tightness test car body of the present invention and tightness test platform box body connector can by tightness test platform to test car body carry out tightness test time, car body will be tested be connected with tightness test platform, achieve and inside and outside loading is carried out to test car body simultaneously, and it is outer only when carrying out external load to test car body, enter test vehicle body by the sealing wicket in transition body and carry out check test part, understand the carrying situation of testpieces, reach the object of tightness test, simultaneously, this tightness test car body and tightness test platform box body connector structure simple, easy to operate, and the adjustable function achieved at the elevating mechanism by transition body bottom in transition body short transverse, so that connect.
Accompanying drawing explanation
Fig. 1 is the tightness test car body of the embodiment of the present invention and the structural representation of tightness test platform box body connector;
Fig. 2 is that the A of the tightness test car body of the embodiment of the present invention and tightness test platform box body connector is to structural representation;
Fig. 3 is that the B of the tightness test car body of the embodiment of the present invention and tightness test platform box body connector is to structural representation.
In figure, 1: casing joint flange; 2: transition body; 3: car body joint flange; 4: bleeding point joint flange; 5: sealing wicket; 6: inflation inlet joint flange; 7: supporting trolley; 8: elevating mechanism; 9: intermediate door.
Embodiment
Below in conjunction with drawings and Examples, embodiments of the present invention are described in further detail.Following examples for illustration of the present invention, but can not be used for limiting the scope of the invention.
As Figure 1-3, the tightness test car body of the present embodiment and tightness test platform box body connector comprise: transition body 2, car body joint flange 3, casing joint flange 1, bleeding point joint flange 4, inflation inlet joint flange 6, supporting mechanism and elevating mechanism 8.
Transition body 2 is passage shape, cylindrical channel shape is preferably in the present embodiment, the intermediate plate 9 transition body 2 inner space being blocked (blocking perpendicular to its axis by transition body 2 inner space) is provided with in transition body 2, intermediate plate 9 is provided with sealing wicket 5, the edge of sealing wicket 5 is provided with air bag, and described air bag can make sealing wicket 5 and intermediate plate 9 form good sealing effectiveness by inflation.
Car body joint flange 3 is located at one end of transition body 2, and the shape of the shape frock corresponding to instruction carriage end of body of car body joint flange 3 is corresponding, for being connected by the end part seal of transition body 2 with tightness test car body.
Casing joint flange 1 is located at the other end of transition body 2, and the shape of car body joint flange 1 can be identical with the end shape of transition body 2, for being tightly connected at the gate place of transition body 2 with tightness test platform casing.
Bleeding point joint flange 4 is located at the middle part of transition body 2 and is arranged in the side (sidewall that be namely positioned at transition body 2 on and be positioned at two parts of by intermediate plate being blocked near of car body joint flange 3) of intermediate plate 9 near car body joint flange 3, for being connected the bleeding point of tightness test platform by pipeline.
Inflation inlet joint flange 6 is located at the middle part of transition body 2 and is arranged in the side (sidewall that be namely positioned at transition body 2 on and be positioned at two parts of by intermediate plate being blocked near of car body joint flange 3) of intermediate plate 9 near car body joint flange 3, for being connected the inflation inlet of tightness test platform by pipeline.
Described supporting mechanism is located at the bottom of transition body 2, and described supporting mechanism 2 can be supporting trolley 7, and supporting trolley 7 is for being transported to tightness test desired position by transition body 2 (or whole coupling arrangement); Elevating mechanism 8 is provided with between transition body 2 and supporting trolley 7, elevating mechanism 8 can comprise multiple hydraulic cylinder, elevating mechanism 8, for adjusting the height of transition body 2, can be good to make the car body joint flange 3 of transition body 2 one end being connected with the end part seal testing car body.
Car body joint flange 3, casing joint flange 1, bleeding point joint flange 4 and inflation inlet joint flange 6 are all connected and sealed by the appropriate section of bolt and tightness test platform.
Car body joint flange 3, casing joint flange 1, bleeding point joint flange 4 and inflation inlet joint flange 6 are all connected with transition body 2 by the mode of welding.
The tightness test car body of the present embodiment and several duties of tightness test platform box body connector as follows:
If when only carrying out inside loading to test car body, closed by sealing wicket 5, and the air bag air feed on wicket 5 will be sealed, with anti-leak, now, can check test car body in the outside of test car body.
If when only carrying out external load to test car body, sealing wicket 5 can be opened, and enter test vehicle body by sealing wicket 5, now, can check test car body in the inside of test car body.
If outside need be carried out and inside loads to test car body simultaneously, sealing wicket 5 need be closed, and by the air bag on sealing wicket 5 for hermetic seal, now can not enter test vehicle body and check, only by the monitoring of tightness test platform, car body be observed.
Tightness test car body of the present invention and tightness test platform box body connector can by tightness test platform to test car body carry out tightness test time, car body will be tested be connected with tightness test platform, achieve and inside and outside loading is carried out to test car body simultaneously, and it is outer only when carrying out external load to test car body, enter test vehicle body by the sealing wicket in transition body and carry out check test part, understand the carrying situation of testpieces, reach the object of tightness test, simultaneously, this tightness test car body and tightness test platform box body connector structure simple, easy to operate, and the adjustable function achieved at the elevating mechanism by transition body bottom in transition body short transverse, so that connect, easy for installation, significantly can reduce workload and the labour intensity of test, shorten test setup time, security is high, the efficiency and quality that improve test are had very important significance.
Embodiments of the invention provide in order to example with for the purpose of describing, and are not exhaustively or limit the invention to disclosed form.Many modifications and variations are apparent for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.
Claims (9)
1. tightness test car body and a tightness test platform box body connector, is characterized in that, comprising:
Transition body, described transition body is passage shape, and be provided with the intermediate plate blocked described transition body inner space in described transition body, described intermediate plate is provided with sealing wicket;
Car body joint flange, described car body joint flange is located at one end of described transition body, for connecting the end of tightness test car body;
Casing joint flange, described casing joint flange is located at the other end of described transition body, for connecting the gate place of tightness test platform casing;
Bleeding point joint flange, described bleeding point joint flange is located at the middle part of described transition body and is positioned at the side of described intermediate plate near described car body joint flange, for being connected the bleeding point of tightness test platform by pipeline;
Inflation inlet joint flange, described inflation inlet joint flange is located at the middle part of described transition body and is positioned at the side of described intermediate plate near described car body joint flange, for being connected the inflation inlet of tightness test platform by pipeline.
2. tightness test car body according to claim 1 and tightness test platform box body connector, is characterized in that, described tightness test car body and tightness test platform box body connector also comprise supporting mechanism, and described supporting mechanism is located at the bottom of described transition body.
3. tightness test car body according to claim 2 and tightness test platform box body connector, is characterized in that, described supporting mechanism is supporting trolley.
4. tightness test car body according to claim 3 and tightness test platform box body connector, is characterized in that, be provided with elevating mechanism between described transition body and described supporting trolley.
5. tightness test car body according to claim 4 and tightness test platform box body connector, it is characterized in that, described elevating mechanism comprises multiple hydraulic cylinder.
6. tightness test car body according to claim 1 and tightness test platform box body connector, is characterized in that, the edge of described sealing wicket is provided with air bag.
7. tightness test car body according to claim 1 and tightness test platform box body connector, it is characterized in that, described car body joint flange, casing joint flange, bleeding point joint flange and inflation inlet joint flange are all connected and sealed by the appropriate section of bolt and tightness test platform.
8. tightness test car body according to claim 1 and tightness test platform box body connector, it is characterized in that, described car body joint flange, casing joint flange, bleeding point joint flange and inflation inlet joint flange are all connected with described transition body by the mode of welding.
9. according to the tightness test car body in claim 1-8 described in any one and tightness test platform box body connector, it is characterized in that, described transition body is right cylinder passage shape.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201410539362.8A CN104266851B (en) | 2014-10-13 | 2014-10-13 | Air seal test car body and air seal test platform box body connector |
PCT/CN2015/091749 WO2016058507A1 (en) | 2014-10-13 | 2015-10-12 | Device for connecting air-tight test vehicle body and air-tight test bench case |
AU2015333261A AU2015333261B2 (en) | 2014-10-13 | 2015-10-12 | Device for connecting air-tight test vehicle body and air-tight test bench case |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201410539362.8A CN104266851B (en) | 2014-10-13 | 2014-10-13 | Air seal test car body and air seal test platform box body connector |
Publications (2)
Publication Number | Publication Date |
---|---|
CN104266851A true CN104266851A (en) | 2015-01-07 |
CN104266851B CN104266851B (en) | 2016-09-07 |
Family
ID=52158392
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201410539362.8A Active CN104266851B (en) | 2014-10-13 | 2014-10-13 | Air seal test car body and air seal test platform box body connector |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN104266851B (en) |
AU (1) | AU2015333261B2 (en) |
WO (1) | WO2016058507A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016058507A1 (en) * | 2014-10-13 | 2016-04-21 | 南车青岛四方机车车辆股份有限公司 | Device for connecting air-tight test vehicle body and air-tight test bench case |
CN110426166A (en) * | 2019-08-22 | 2019-11-08 | 中车成都机车车辆有限公司 | A kind of railcar air seal test blocks tooling and its packaging technology |
CN110668051A (en) * | 2018-07-03 | 2020-01-10 | 河南森源重工有限公司 | Water test leakage detection sealing method for welding seam of garbage compression truck box body |
CN111766137A (en) * | 2020-08-27 | 2020-10-13 | 中车青岛四方机车车辆股份有限公司 | Test tool and test method for train apron board |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5780722A (en) * | 1996-03-07 | 1998-07-14 | Abb Traction, Inc. | Method and apparatus for testing watertightness of a railcar |
EP1298425A2 (en) * | 2001-09-28 | 2003-04-02 | Liebherr-Aerospace Lindenberg GmbH | Procedure and device for measuring the leak tightness of vehicles, in particular railway vehicles |
CN201198307Y (en) * | 2008-08-05 | 2009-02-25 | 铁道部运输局 | High air tightness rail vehicle body |
CN101975696A (en) * | 2010-10-25 | 2011-02-16 | 中南大学 | Testing method for loading alternating pneumatic load in high-speed train body |
CN101982752A (en) * | 2010-10-25 | 2011-03-02 | 中南大学 | Test method by loading alternating aerodynamic load outside train body of high-speed train |
DE102010051662A1 (en) * | 2010-11-17 | 2012-01-19 | Liebherr-Transportation Systems Gmbh & Co. Kg | Method for monitoring pressure tightness of high speed rail vehicle during driving, involves monitoring pressure tightness of pressure-fit rail vehicle in erroneous function by evaluation of dynamic behavior of outer and inner pressures |
CN102628726A (en) * | 2012-04-06 | 2012-08-08 | 江苏达诺尔半导体超纯科技有限公司 | Leakage point detecting device for clean liner container |
CN102680181A (en) * | 2011-03-14 | 2012-09-19 | 铁道部运输局 | Method and device for testing vehicle body airtightness and fatigue of railway vehicle |
CN204165760U (en) * | 2014-10-13 | 2015-02-18 | 南车青岛四方机车车辆股份有限公司 | Tightness test car body and tightness test platform box body connector |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05306969A (en) * | 1992-05-01 | 1993-11-19 | Nisshin Kinzoku Seisakusho:Kk | Method and device for performing fatigue test on car body |
CA2106951A1 (en) * | 1992-09-30 | 1994-03-31 | Keith George Hubert | Apparatus and method for deodorizing a vehicle and for detecting air leaks |
CN2233059Y (en) * | 1995-08-07 | 1996-08-14 | 张志强 | Inlaid frame compound board air duct |
CN201138273Y (en) * | 2007-12-19 | 2008-10-22 | 重庆长安汽车股份有限公司 | Entire carriage air tightness detecting device |
CN100547371C (en) * | 2008-08-05 | 2009-10-07 | 铁道部运输局 | Rail vehicle whole tightness test method and system |
CN102607865B (en) * | 2012-01-13 | 2014-08-13 | 西南交通大学 | Air sac pushing device for motor vehicle collision test |
CN202442850U (en) * | 2012-01-19 | 2012-09-19 | 河南金明自动化设备有限公司 | Mobile airtightness detection apparatus with automatic warehouse airtightness detection function |
CN103364201A (en) * | 2012-04-09 | 2013-10-23 | 上海焓熵环境技术有限公司 | Sealing device for automobile cabin and HVAC air-vent air quantity and air door |
CN104266851B (en) * | 2014-10-13 | 2016-09-07 | 中车青岛四方机车车辆股份有限公司 | Air seal test car body and air seal test platform box body connector |
-
2014
- 2014-10-13 CN CN201410539362.8A patent/CN104266851B/en active Active
-
2015
- 2015-10-12 WO PCT/CN2015/091749 patent/WO2016058507A1/en active Application Filing
- 2015-10-12 AU AU2015333261A patent/AU2015333261B2/en active Active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5780722A (en) * | 1996-03-07 | 1998-07-14 | Abb Traction, Inc. | Method and apparatus for testing watertightness of a railcar |
EP1298425A2 (en) * | 2001-09-28 | 2003-04-02 | Liebherr-Aerospace Lindenberg GmbH | Procedure and device for measuring the leak tightness of vehicles, in particular railway vehicles |
CN201198307Y (en) * | 2008-08-05 | 2009-02-25 | 铁道部运输局 | High air tightness rail vehicle body |
CN101975696A (en) * | 2010-10-25 | 2011-02-16 | 中南大学 | Testing method for loading alternating pneumatic load in high-speed train body |
CN101982752A (en) * | 2010-10-25 | 2011-03-02 | 中南大学 | Test method by loading alternating aerodynamic load outside train body of high-speed train |
DE102010051662A1 (en) * | 2010-11-17 | 2012-01-19 | Liebherr-Transportation Systems Gmbh & Co. Kg | Method for monitoring pressure tightness of high speed rail vehicle during driving, involves monitoring pressure tightness of pressure-fit rail vehicle in erroneous function by evaluation of dynamic behavior of outer and inner pressures |
CN102680181A (en) * | 2011-03-14 | 2012-09-19 | 铁道部运输局 | Method and device for testing vehicle body airtightness and fatigue of railway vehicle |
CN102628726A (en) * | 2012-04-06 | 2012-08-08 | 江苏达诺尔半导体超纯科技有限公司 | Leakage point detecting device for clean liner container |
CN204165760U (en) * | 2014-10-13 | 2015-02-18 | 南车青岛四方机车车辆股份有限公司 | Tightness test car body and tightness test platform box body connector |
Non-Patent Citations (2)
Title |
---|
李玉洁 等: ""动车组车辆气密性指标的初步探讨"", 《铁道机车车辆》 * |
苏晓峰 等: ""高速列车气密性研究综述"", 《铁道车辆》 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016058507A1 (en) * | 2014-10-13 | 2016-04-21 | 南车青岛四方机车车辆股份有限公司 | Device for connecting air-tight test vehicle body and air-tight test bench case |
CN110668051A (en) * | 2018-07-03 | 2020-01-10 | 河南森源重工有限公司 | Water test leakage detection sealing method for welding seam of garbage compression truck box body |
CN110426166A (en) * | 2019-08-22 | 2019-11-08 | 中车成都机车车辆有限公司 | A kind of railcar air seal test blocks tooling and its packaging technology |
CN111766137A (en) * | 2020-08-27 | 2020-10-13 | 中车青岛四方机车车辆股份有限公司 | Test tool and test method for train apron board |
Also Published As
Publication number | Publication date |
---|---|
WO2016058507A1 (en) | 2016-04-21 |
CN104266851B (en) | 2016-09-07 |
AU2015333261A1 (en) | 2016-07-28 |
AU2015333261B2 (en) | 2017-02-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN104266851A (en) | Device for connecting airtight test vehicle body with airtight test bed box | |
CN102416854B (en) | Vehicle door edge inflatable seal system | |
CN102680181A (en) | Method and device for testing vehicle body airtightness and fatigue of railway vehicle | |
CN204124512U (en) | For the internal pressure release gear of voltage transformer | |
CN110068424A (en) | Railway carriage air seal test gas-tight door and air tight test method | |
CN107907280A (en) | ABS hydraulic pressure units sealing property testing equipment and its test method | |
CN204165760U (en) | Tightness test car body and tightness test platform box body connector | |
CN101879901B (en) | Station passage for vacuum pipeline transportation | |
CN203979896U (en) | Portable fuel gas pipeline leakage detection device | |
CN101837789A (en) | Vacuum pipe traffic openable pipeline configuration and technology | |
CN207934749U (en) | A kind of double bolloon inflatable gas-tight door | |
CN206678876U (en) | One kind hides embedded slag-soil truck obturator | |
CN103439067B (en) | Metro bogie static test bed air spring tightness test device | |
CN105675215B (en) | A kind of hydraulic type plate air pressure testing device | |
CN105201610B (en) | Vehicular oil engine automatic fume exhauster | |
CN204373866U (en) | Pressure testing device and rail vehicle truck | |
CN208674307U (en) | A kind of full automatic car power battery leakage detection equipment | |
CN110646293A (en) | Hatch cover testing device | |
CN206563174U (en) | Gas system is unloaded in hydraulic natural gas automobile secondary gas filling station and its oil return | |
CN203793324U (en) | Brake main pipe connection valve for wagons | |
CN203512405U (en) | Material testing bin based on dry-mixed mortar carrier vehicle | |
CN206344809U (en) | A kind of suspension monorail limiter | |
CN206370407U (en) | Vacuum packaging equipment | |
CN207215397U (en) | A kind of lithium ion battery airtightness detection means | |
CN216002555U (en) | Transit cabin and pipeline transportation device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
CB02 | Change of applicant information |
Address after: Chengyang District of Shandong city of Qingdao province Jinhong road 266111 No. 88 Applicant after: CRRC QINGDAO SIFANG CO., LTD. Address before: Chengyang District of Shandong city of Qingdao province Jinhong road 266111 No. 88 Applicant before: CSR Qingdao Sifang Locomotive and Rolling Stock Co., Ltd. |
|
COR | Change of bibliographic data | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant |