CN109969212B - Rail train and air conditioner air duct thereof - Google Patents
Rail train and air conditioner air duct thereof Download PDFInfo
- Publication number
- CN109969212B CN109969212B CN201711450521.7A CN201711450521A CN109969212B CN 109969212 B CN109969212 B CN 109969212B CN 201711450521 A CN201711450521 A CN 201711450521A CN 109969212 B CN109969212 B CN 109969212B
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- air
- chamber
- duct
- air duct
- wind
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- 230000001276 controlling effect Effects 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 238000004378 air conditioning Methods 0.000 claims description 27
- 230000007704 transition Effects 0.000 claims description 13
- 238000005192 partition Methods 0.000 abstract description 8
- 238000009423 ventilation Methods 0.000 abstract description 7
- 238000004891 communication Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D27/00—Heating, cooling, ventilating, or air-conditioning
- B61D27/0018—Air-conditioning means, i.e. combining at least two of the following ways of treating or supplying air, namely heating, cooling or ventilating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses an air conditioner air duct of a rail train, which comprises a passenger room air duct and a driver cab main air duct, wherein the passenger room air duct comprises a cold air cavity, two warm air cavities, a first new air cavity and a distribution valve for regulating and controlling the proportion of cold air to warm air, the driver cab main air duct comprises a middle air cavity and two side air cavities, one side of the middle air cavity is provided with a second fresh air cavity for communicating the first fresh air cavity, the middle air cavity comprises an upper air cavity and a lower air cavity, the upper air cavity and the lower air cavity are isolated and independent from each other through a gradient partition board, and the gradient partition board is provided with a valve. The multifunctional requirement of the air conditioner air duct is met, the cold air and the hot air are separately conveyed, the uniformity is good, the air duct structure is integrated, the space is saved, and when the cab needs emergency ventilation, the valve is conducted, the air is discharged from the air outlet of the middle air chamber, the passenger room air duct is used for emergency air supply of the cab, and the emergency treatment capacity is improved. The invention also discloses a rail train comprising the air conditioner air duct.
Description
Technical Field
The invention relates to the field of rail trains, in particular to an air conditioning duct of a rail train. In addition, the invention also relates to a rail train comprising the air conditioner air duct.
Background
A motor train unit is a type of rail train that is a train comprised of at least two locomotives or powered cars and a number of unpowered cars. Such trains include an air conditioning system for maintaining comfort of the car, and an air conditioning duct delivers an air conditioning airflow to a desired area within the car. The function in current air conditioner wind channel is simple, generally only possesses the function of guest room air supply, and the structure is single, leads to the temperature homogeneity poor in the carriage, and the cab air supply needs other equipment to accomplish, can not satisfy the multi-functional demand in air conditioner wind channel, and when needs emergent ventilation, the guest room wind channel can not be for the urgent air supply of cab, and emergency treatment ability is relatively poor.
Therefore, how to provide an air conditioner air duct, the multifunctional requirement of the air conditioner air duct is met, space is saved, when emergency ventilation is needed, the passenger room air duct can supply air for a cab in an emergency mode, emergency treatment capacity is improved, and the problem to be solved in an emergency mode is solved.
Disclosure of Invention
The invention aims to provide an air conditioner air duct of a rail train, which meets the multifunctional requirement of the air conditioner air duct, has the advantages of separate delivery of cold and hot air, good uniformity, integrated air duct structure, space saving, and capability of supplying air for a cab in an emergency when the cab needs emergency ventilation, so that the emergency treatment capability is improved. Another object of the invention is to provide a rail train comprising the air conditioning duct described above.
In order to solve the technical problems, the invention provides an air conditioner air duct of a rail train, which comprises a passenger room air duct and a cab main air duct, wherein the passenger room air duct comprises a cold air cavity used for conveying cold air, two warm air cavities which are positioned at two sides of the cold air cavity and used for conveying warm air, a first fresh air cavity which is positioned at one side of the cold air cavity, and a distribution valve used for regulating and controlling the proportion of cold air to warm air, the cab main air duct comprises an intermediate air cavity communicated with the cold air cavity and two side air cavities which are positioned at two sides of the intermediate air cavity and respectively communicated with two warm air cavities, one side of the intermediate air cavity is provided with a second fresh air cavity which is used for being communicated with the first fresh air cavity, the intermediate air cavity comprises an upper air cavity communicated with a rear air port and a lower air cavity communicated with a front air port, the upper air cavity and the lower air cavity are mutually independent through a gradient partition plate, and the gradient partition plate is provided with a valve used for controlling the communication state of the intermediate air cavity.
Preferably, the rear end of the second fresh air cavity is closed, and a fresh air interface is arranged at the lower part of the second fresh air cavity.
Preferably, the air conditioner further comprises an auxiliary air duct, the first auxiliary air duct comprises an intermediate auxiliary air chamber and two side auxiliary air chambers located on two sides of the intermediate auxiliary air chamber, the front ends of the intermediate auxiliary air chambers are communicated with the cold air chamber, the rear ends of the intermediate auxiliary air chambers are communicated with the intermediate air chamber, the front ends of the side auxiliary air chambers are communicated with corresponding warm air chambers, the rear ends of the side auxiliary air chambers are communicated with corresponding side air chambers, the auxiliary air duct further comprises a third fresh air chamber arranged on one side of the intermediate auxiliary air duct, and two ends of the third fresh air chamber are respectively communicated with the first fresh air chamber and the second fresh air chamber.
Preferably, the first fresh air cavity is arranged above one warm air cavity, the second fresh air cavity is arranged on the side surface corresponding to the side air cavity, and the third fresh air cavity is arranged on the side surface corresponding to the side auxiliary air cavity.
Preferably, the auxiliary air duct comprises a first auxiliary air duct and a second auxiliary air duct which are sequentially communicated, wherein the width of the first auxiliary air duct is equal to that of the main air duct and is larger than that of the second auxiliary air duct.
Preferably, a heater is arranged in the second auxiliary air duct, and an air supply outlet is arranged at the lower part of the second auxiliary air duct.
Preferably, the air conditioner further comprises a transition air duct which is respectively communicated with the main air duct of the cab and the air conditioner unit of the cab, and air cavities in the transition air duct are correspondingly communicated with all air cavities of the main air duct of the cab.
Preferably, the width of the main air duct of the cab and the width of the transition air duct are equal to the width of the passenger air duct.
Preferably, connecting pieces are arranged on two sides of each air duct end, and connecting holes for bolt connection are formed in the connecting pieces.
The invention provides a rail train, which comprises a carriage and an air conditioning air duct arranged at the upper part of the carriage, wherein the air conditioning air duct is specifically any one of the air conditioning air ducts.
The invention provides an air conditioner air duct of a rail train, which comprises a passenger room air duct and a cab main air duct, wherein the passenger room air duct comprises a cold air cavity, two warm air cavities positioned at two sides of the cold air cavity, a first fresh air cavity positioned at one side of the cold air cavity and a distribution valve for regulating and controlling the cold and warm air supply proportion, the cab main air duct comprises a middle air cavity communicated with the cold air cavity and two side air cavities positioned at two sides of the middle air cavity and respectively communicated with the two warm air cavities, one side of the middle air cavity is provided with a second fresh air cavity communicated with the first fresh air cavity, the middle air cavity comprises an upper air cavity communicated with a rear air port and a lower air cavity communicated with a front air port, the upper air cavity and the lower air cavity are mutually isolated and independent through a gradient partition plate, and the gradient partition plate is provided with a valve for controlling the communication state of the middle air cavity.
Through setting up the cab main air duct, intercommunication guest room wind channel and cab can be for the cab air supply, satisfy the multi-functional demand in air conditioner wind channel, the wind channel has amortization heating function, the cold and hot air is separately carried, the temperature homogeneity is good, the wind channel structure is integrated, save space, and carry cold wind chamber and warm braw chamber according to different seasons and proportion distribution with the air current of unit transportation department through distributing valve, and when the cab needs emergent ventilation, the valve switches on, the wind outlet of wind chamber in the middle of through the intercommunication, the guest room wind channel is the cab emergency air supply, improve emergency handling capacity.
The invention also provides a rail train comprising the air conditioning duct, and the rail train has the same technical effects as the air conditioning duct and is not described in detail herein.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of an air conditioning duct according to the present invention;
fig. 2 is an exploded schematic view of an embodiment of an air conditioning duct according to the present invention.
Detailed Description
The invention has the core of providing the air conditioning air duct of the rail train, which meets the multifunctional requirement of the air conditioning air duct, has the advantages of separate delivery of cold and hot air, good uniformity, integrated air duct structure, space saving, and capability of supplying air for the cab in an emergency when the cab needs emergency ventilation, thereby improving the emergency treatment capability. Another core of the invention is to provide a rail train comprising the air conditioning duct.
In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an embodiment of an air conditioner duct according to the present invention; fig. 2 is an exploded schematic view of an embodiment of an air conditioning duct according to the present invention.
The embodiment of the invention provides an air conditioner air duct of a rail train, which comprises a passenger room air duct 1, wherein the passenger room air duct 1 comprises a cold air cavity 11 used for conveying cold air, two warm air cavities 12 positioned at two sides of the cold air cavity 11 and used for conveying warm air, and a first fresh air cavity 13 positioned at one side of the cold air cavity 11, namely, one warm air cavity 12 is positioned at the same side as the first fresh air cavity 13, and also comprises a main air duct 2 of a cab, the main air duct 2 of the cab comprises a middle air cavity communicated with the cold air cavity 11 and two side air cavities 23 positioned at two sides of the middle air cavity, and the two warm air cavities 12 are respectively communicated, one side of the middle air cavity is provided with a second fresh air cavity 24 used for communicating with the first fresh air cavity 13, namely, one side air cavity 23 and the second fresh air cavity 13 are positioned at the same side. The distribution valve comprises a servo motor and a valve structure, wherein the passenger room air channel 1 is of a multi-stage sectional structure, and the distribution valve is arranged in a section of passenger room air channel 1 far away from the main air channel 2 of the cab.
The lower part of the middle wind cavity is provided with a front wind opening and a rear wind opening, the middle wind cavity comprises an upper wind cavity 21 communicated with the rear wind opening and a lower wind cavity 22 used for being communicated with the front wind opening, the upper wind cavity 21 and the lower wind cavity 22 are mutually isolated and independent through gradient partition boards, and a valve used for controlling the communication state of the middle wind cavity is arranged on the gradient partition boards. When the valve is closed, the middle air cavity and the passenger room air duct 1 are mutually independent, and when the valve is opened, the middle air cavity and the passenger room air duct are communicated, and emergency air supply is performed for the cab through the air port.
Through setting up cab main air duct 2, intercommunication guest room wind channel 1 and cab can be for the cab air feed, satisfy the multi-functional demand in air conditioner wind channel, the wind channel has amortization heating function, the cold and hot air is separately carried, temperature uniformity is good, the wind channel structure is integrated, save space, and carry cold wind chamber and warm braw chamber according to different seasons and proportion distribution with the air current of unit transportation department through distributing valve, and when the cab needs emergent ventilation, the valve switches on, wind outlet through the wind chamber in the middle of the intercommunication, guest room wind channel 1 is the emergent air feed of cab, improve emergency handling ability.
Specifically, the rear end of the second fresh air chamber 24 is closed, and a fresh air interface is provided at the lower part of the second fresh air chamber 24. That is, the second fresh air chamber 24 changes the air supply mode of fresh air from horizontal air supply to vertical air supply, and fresh air is sent out to the cab air conditioner through the fresh air interface at the lower part.
In the air conditioning duct provided in the embodiment of the present invention, the air conditioning duct further includes an auxiliary duct, the first auxiliary duct 3 includes a middle auxiliary air chamber 31 and two side auxiliary air chambers 32 located at two sides of the middle auxiliary air chamber 31, the front end of the middle auxiliary air chamber 31 is communicated with the cold air chamber 11, the rear end of the middle auxiliary air chamber 31 is communicated with the middle air chamber, the front end of the side auxiliary air chamber 32 is communicated with the corresponding warm air chamber 12, the rear end of the side auxiliary air chamber 32 is communicated with the corresponding side air chamber 23, the auxiliary duct further includes a third fresh air chamber 33 disposed at one side of the middle auxiliary duct, and two ends of the third fresh air chamber 33 are respectively communicated with the first fresh air chamber 13 and the second fresh air chamber 24. Namely, the first fresh air cavity 13, the third fresh air cavity 33 and the second fresh air cavity 24 are sequentially connected, and the communication between the first fresh air cavity 13 and the second fresh air cavity 24 is realized through the third fresh air cavity 33, so that the sizes of the air cavities are transitionally connected and adjusted to meet the installation requirement of the main air duct 2 of the cab.
Specifically, the structure of the fresh air chamber is adjusted, the first fresh air chamber 13 is disposed above one warm air chamber 12, the second fresh air chamber 24 is disposed on the side corresponding to the side air chamber 23, and the third fresh air chamber 33 is disposed on the side corresponding to the side auxiliary air chamber 32.
Wherein, supplementary wind channel is including the first supplementary wind channel 3 and the supplementary wind channel 4 of second that communicate in proper order, and the width in first supplementary wind channel 3 equals the width in main wind channel, and is greater than the width in the supplementary wind channel 4 of second. By arranging two sections of auxiliary air channels, the processing is convenient. Correspondingly, the second auxiliary air duct 4 is also internally provided with a middle auxiliary air cavity 41, a side auxiliary air cavity 42 and a third fresh air cavity 43, corresponding to each cavity in the first auxiliary air duct 3, a heater can be further arranged in the second auxiliary air duct 4, and an air supply port is arranged at the lower part of the second auxiliary air duct 4, so that an air supply heating function and a lower air supply function are realized, and the heater and the air supply port can be respectively arranged in different air ducts and are all within the protection scope of the invention.
On the basis of the air conditioner air duct provided by the specific embodiments, the air conditioner air duct further comprises a transition air duct 5 which is respectively communicated with the main air duct 2 of the cab and the air conditioner unit of the cab, and air cavities in the transition air duct 5 are correspondingly communicated with all air cavities of the main air duct 2 of the cab. The air chambers in the transition air duct 5 are an upper transition air chamber 51, a lower transition air chamber 52 and two side transition air chambers 53, which correspond to the air chambers of the main air duct 2 of the cab in direction.
Wherein the width of the main air duct 2 of the cab and the width of the transition air duct 5 are equal to the width of the air duct 1 of the passenger cab. Connecting pieces are arranged on two sides of the end parts of each air duct, and connecting holes for bolt connection are formed in the connecting pieces. The size and the connection mode of each air duct can be adjusted according to the situation, and the air duct is within the protection scope of the invention.
In addition to the air conditioning duct, the specific embodiment of the invention also provides a rail train comprising the air conditioning duct, and the structure of other parts of the rail train is referred to the prior art, and is not repeated herein.
The rail train and the air conditioner air duct thereof provided by the invention are described in detail. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (10)
1. The utility model provides an air conditioner wind channel of rail train, its characterized in that, including passenger compartment wind channel (1) and cab main wind channel (2), passenger compartment wind channel (1) are including being used for carrying cold wind chamber (11), be located cold wind chamber (11) both sides and be used for carrying two warm braw wind chamber (12), be located first new trend chamber (13) of cold wind chamber (11) one side and be used for regulating and controlling the distribution valve of changes in temperature air supply ratio, cab main wind channel (2) are including the intercommunication cold wind chamber (11) middle wind chamber and be located middle wind chamber both sides and respectively communicate two side wind chamber (23) of warm wind chamber (12), one side of middle wind chamber is provided with and is used for the intercommunication second new trend chamber (24) of first new trend chamber (13), middle wind chamber is including last wind chamber (21) and lower wind chamber (22) that are used for the intercommunication front wind gap, go up wind chamber (21) with lower wind chamber (22) are through the baffle mutually independent setting up and are used for controlling the slope intercommunication state.
2. The air conditioning duct according to claim 1, characterized in that the rear end of the second fresh air chamber (24) is closed, and the lower part of the second fresh air chamber (24) is provided with a fresh air interface.
3. The air conditioner air duct according to claim 2, further comprising an auxiliary air duct, wherein the first auxiliary air duct (3) comprises an intermediate auxiliary air chamber (31) and two side auxiliary air chambers (32) positioned at two sides of the intermediate auxiliary air chamber (31), the front end of the intermediate auxiliary air chamber (31) is communicated with the cold air chamber (11), the rear end of the intermediate auxiliary air chamber (31) is communicated with the intermediate air chamber, the front end of the side auxiliary air chamber (32) is communicated with a corresponding warm air chamber (12), the rear end of the side auxiliary air chamber (32) is communicated with a corresponding side air chamber (23), the auxiliary air duct further comprises a third fresh air chamber (33) arranged at one side of the intermediate auxiliary air duct, and two ends of the third fresh air chamber (33) are respectively communicated with the first fresh air chamber (13) and the second fresh air chamber (24).
4. An air conditioning duct according to claim 3, characterized in that the first fresh air chamber (13) is arranged above one of the warm air chambers (12), the second fresh air chamber (24) is arranged on the side corresponding to the side air chamber (23), and the third fresh air chamber (33) is arranged on the side corresponding to the side auxiliary air chamber (32).
5. The air conditioner air duct according to claim 4, wherein the auxiliary air duct comprises a first auxiliary air duct (3) and a second auxiliary air duct (4) which are sequentially communicated, and the width of the first auxiliary air duct (3) is equal to the width of the main air duct and is larger than the width of the second auxiliary air duct (4).
6. The air conditioner air duct according to claim 5, wherein a heater is arranged in the second auxiliary air duct (4), and an air supply port is arranged at the lower part of the second auxiliary air duct (4).
7. The air conditioner air duct according to any one of claims 1 to 6, further comprising a transition air duct (5) respectively communicating the main air duct (2) of the cab and the air conditioner unit of the cab, wherein air cavities in the transition air duct (5) are correspondingly communicated with air cavities of the main air duct (2) of the cab.
8. The air conditioning duct according to claim 7, characterized in that the width of the cab main duct (2) and the width of the transition duct (5) are equal to the width of the passenger compartment duct (1).
9. The air-conditioning duct according to claim 8, wherein connecting pieces are provided on both sides of each duct end, and connecting holes for bolting are provided on the connecting pieces.
10. A rail train comprising a car and an air conditioning duct arranged at the upper part of the car, characterized in that the air conditioning duct is in particular an air conditioning duct according to any one of claims 1 to 9.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711450521.7A CN109969212B (en) | 2017-12-27 | 2017-12-27 | Rail train and air conditioner air duct thereof |
| PCT/CN2017/119270 WO2019127190A1 (en) | 2017-12-27 | 2017-12-28 | Rail train and air conditioner duct thereof |
| EP17936753.7A EP3617029B1 (en) | 2017-12-27 | 2017-12-28 | Rail train and air conditioner duct thereof |
| RU2018110694A RU2681986C1 (en) | 2017-12-27 | 2018-03-27 | Railway train and air conditioning duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711450521.7A CN109969212B (en) | 2017-12-27 | 2017-12-27 | Rail train and air conditioner air duct thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109969212A CN109969212A (en) | 2019-07-05 |
| CN109969212B true CN109969212B (en) | 2024-03-22 |
Family
ID=67071947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711450521.7A Active CN109969212B (en) | 2017-12-27 | 2017-12-27 | Rail train and air conditioner air duct thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109969212B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110723157A (en) * | 2019-09-23 | 2020-01-24 | 中车南京浦镇车辆有限公司 | Subway vehicle composite air supply system |
| CN115214732B (en) * | 2022-04-29 | 2023-11-28 | 山东朗进科技股份有限公司 | Air supply switching device applied to railway vehicle and control method |
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|---|---|---|---|---|
| JPH08175157A (en) * | 1994-12-27 | 1996-07-09 | Mitsubishi Heavy Ind Ltd | Air conditioner for bus |
| CN102046405A (en) * | 2008-05-30 | 2011-05-04 | 三菱电机株式会社 | Air-conditioning system for vehicle |
| CN105946884A (en) * | 2016-06-27 | 2016-09-21 | 中车唐山机车车辆有限公司 | Air feeding system for vehicle |
| CN206155458U (en) * | 2016-10-26 | 2017-05-10 | 中车株洲电力机车有限公司 | Double -deck rail vehicle air conditioning system |
| EP3172104A1 (en) * | 2014-07-24 | 2017-05-31 | Bombardier Transportation GmbH | Air distribution device for the interior of a rail vehicle |
| EP3202634A1 (en) * | 2014-10-03 | 2017-08-09 | Hitachi, Ltd. | Railway carriage having air conditioning devices in engineer's cabin, galley, and passenger cabin |
| CN207875648U (en) * | 2017-12-27 | 2018-09-18 | 中车长春轨道客车股份有限公司 | Track train and its air-conditioning duct |
-
2017
- 2017-12-27 CN CN201711450521.7A patent/CN109969212B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08175157A (en) * | 1994-12-27 | 1996-07-09 | Mitsubishi Heavy Ind Ltd | Air conditioner for bus |
| CN102046405A (en) * | 2008-05-30 | 2011-05-04 | 三菱电机株式会社 | Air-conditioning system for vehicle |
| EP3172104A1 (en) * | 2014-07-24 | 2017-05-31 | Bombardier Transportation GmbH | Air distribution device for the interior of a rail vehicle |
| EP3202634A1 (en) * | 2014-10-03 | 2017-08-09 | Hitachi, Ltd. | Railway carriage having air conditioning devices in engineer's cabin, galley, and passenger cabin |
| CN105946884A (en) * | 2016-06-27 | 2016-09-21 | 中车唐山机车车辆有限公司 | Air feeding system for vehicle |
| CN206155458U (en) * | 2016-10-26 | 2017-05-10 | 中车株洲电力机车有限公司 | Double -deck rail vehicle air conditioning system |
| CN207875648U (en) * | 2017-12-27 | 2018-09-18 | 中车长春轨道客车股份有限公司 | Track train and its air-conditioning duct |
Also Published As
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|---|---|
| CN109969212A (en) | 2019-07-05 |
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