CN107128867A - Loading arm and tank mouth attachment means - Google Patents
Loading arm and tank mouth attachment means Download PDFInfo
- Publication number
- CN107128867A CN107128867A CN201710495413.5A CN201710495413A CN107128867A CN 107128867 A CN107128867 A CN 107128867A CN 201710495413 A CN201710495413 A CN 201710495413A CN 107128867 A CN107128867 A CN 107128867A
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- CN
- China
- Prior art keywords
- cover plate
- tank mouth
- ground
- gas collecting
- flow tube
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/42—Filling nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention discloses and gas collecting jar with ground-on cover plate and cylinder is installed on loading arm and tank mouth attachment means, cover plate, and the gas collecting jar with ground-on cover plate side is provided with outlet flange, and the outlet flange is used to connect gas recovery approach, and the top of the gas collecting jar with ground-on cover plate is provided with cover；The cover plate upper surface, which is provided with groove, groove, installs gas collecting jar with ground-on cover plate, and the cover plate is provided with screwed hole, screwed hole, which is used to install in the middle of cylinder, the cover plate, is provided with through hole, and flow tube is passed through from through hole, space is provided between cover plate and the flow tube outer circumference surface, space is connected with gas collecting jar with ground-on cover plate；Flow tube is provided with fanning strip in cover plate lower surface contact position, and flow tube top is provided with external screw thread, and the round nut on external screw thread can compress cover；The present apparatus is simple in construction, be easy to manufacture, reduces production cost；Applicable performance is strong, can be used for most liquid type, the entrucking of different size tank mouth；The reliability of similar structures is improved, for the entrucking of dangerous, harmful fluids, security is improved, reduces environmental pollution.
Description
Technical field
The invention belongs to fluid assembly and disassembly technical field, more particularly to a kind of loading arm and tank mouth attachment means.
Background technology
This patent is related to fluid assembly and disassembly technical field, more particularly to volatility is stronger, inflammable and explosive or with environmental hazard
The handling of property types of liquid；Loading arm for loading and unloading the volatile liquids such as gasoline, its end is provided with nanubrium, and nanubrium is provided with cone
Shape seal cap, nanubrium collectively forms loading arm and the attachment structure of tank car with cone seal cap.Nanubrium is stretched by stretch mode
To tank bottom, loading arm loads liquid into tank car through nanubrium during work, and cone seal cap is fitted close with tank car tank mouth, blocks vertical
Pipe and the annular gap of tank mouth.After the completion of entrucking, nanubrium is taken out from tank car.Add cone seal on the nanubrium used at present
On cap or nanubrium plus other sealing devices, usually the deadweight by nanubrium and seal or cylinder outside tank mouth by seal
Push down tank mouth.During entrucking, because liquid volatile is strong, the air-flow of larger pressure is produced in tank car, in certain of entrucking
A little periods, the thrust that these attachment structures are provided is frequently less than gas shock power, and air-flow is easy to go out loading arm and tank mouth
Junction；In addition, during entrucking, truck tires are diminished by drops, the adhesion of this attachment structure and tank mouth, aggravate
Leakage, causes potential explosion danger or environmental hazard.Tank car after use for many years, tank mouth there are problems that it is uneven, on
The connection stated between attachment structure and tank mouth can not carry out good sealing, and sealing effectiveness is worse.
In recent years, people always search for more preferably connected mode, for solving the above problems.The base of this connected mode
Present principles are that effigurate closure is set on nanubrium, and closure covers tank mouth upper surface, implement to clamp from tank mouth inside,
Make attachment structure and tank mouth firm grip, decline during entrucking together with tank car.In accordance with this principle, having been achieved for some has
The new construction of use value, but in practicality, the problem of having respective.
Such as 1：Chinese Patent Application No. 201210464639.6, it is open（Bulletin）Number:The A of CN 102927388, it is open
A kind of automobile top locking type petroleum vapor recovery sealing device, including nanubrium and the sealing that coordinates with tank mouth at the top of oil truck
Lid, closure center is provided with nanubrium by hole, and closure top is provided with liquid phase cylinder, nanubrium liter is provided with liquid phase cylinder
Sending down abnormally ascending cylinder, piston bush is fixedly connected on nanubrium and with nanubrium, and nanubrium body constitutes the piston rod of nanubrium lift cylinder,
The lower section of closure is provided with cover plate barrel, and the bottom of cover plate barrel is provided with and the bottom buckle machine in oil truck tank mouth along cooperation
Structure.
This device does piston rod with nanubrium, it is impossible to use the cylinder of the universal standard, it is necessary to manufacture special cylinder, not side
Just manufacture, and cost is high；Secondly, the device is in tank mouth and withholds clamping jaw, can only be in tank mouth lower surface very smooth situation
Lower to clamp, clamping effect is bad in use.
Such as 2：Chinese Patent Application No. 201610155508.8, Authorization Notice No.:The B of CN 105692539, are disclosed
A kind of entrucking oil filling riser sealing nanubrium, including fixed outer tube and telescoping inner, seal cap fall way is cased with outside fixed outer tube, close
The lower end of sealing cap fall way is equipped with the seal cap coordinated with tank car tank mouth；Seal cap is provided with seal cap panel, seal cap panel
Lower section is provided with the guide pipe of seal cap panel, and guide pipe is coaxially disposed with seal cap fall way, the lower end of telescoping inner provided with
The baffle ring that guide pipe lower end coordinates, the lower surface of seal cap panel is provided with a circle and the close-fitting inflatable seal machine of tank mouth
Structure, the seal cap panel between inflatable seal mechanism and guide pipe, which is provided with to coordinate with tank mouth inwall, makes seal cap panel and tank
The clamping body that mouth is brought into close contact.
This apparatus structure is excessively complicated, and inflatable bladder is easy to aging damage, and friction part is excessive（Steel friction can be produced
Spark）, linkage is when clamping it cannot be guaranteed that clamping jaw level.For the handling of explosive fluid, security is poor.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of new attachment means, it is therefore intended that realizes loading arm and dress
Car tank mouth is reliably connected, simple in construction, is easy to manufacture, and highly versatile reduces cost, improves safety in utilization.
The technical solution adopted by the present invention is as follows：
Loading arm and tank mouth attachment means, including cover plate, it is characterised in that：Gas collecting jar with ground-on cover plate and cylinder are installed on the cover plate, it is described
Gas collecting jar with ground-on cover plate side is provided with outlet flange, and the outlet flange is used to connect gas recovery approach, and the top of the gas collecting jar with ground-on cover plate is provided with
Cover；
The cover plate upper surface, which is provided with annular groove, groove, installs gas collecting jar with ground-on cover plate, and the cover plate is provided with screwed hole, and screwed hole is used to install
Through hole is provided with the middle of cylinder, the cover plate, flow tube is passed through from through hole, provided with sky between cover plate and the flow tube outer circumference surface
Gap, space is connected with gas collecting jar with ground-on cover plate；
Flow tube is provided with fanning strip in cover plate lower surface contact position, and flow tube top is provided with external screw thread, the circle spiral shell on screw thread
Mother can compress cover；
The piston rod lower surface of the cylinder is equipped with U-shaped hanger, and the hollow part of U-shaped hanger is equipped with to fill on mandrel, mandrel and rotated
Block and clamp lever, the rotary block can be together with clamp levers around mandrel rotation；The cover plate lower surface is provided with
Put away sports equipment copper coin, the groove in plummet direction is provided with the middle of copper coin of putting away sports equipment, for folding and unfolding clamp lever.
Further, connected between the clamp lever and mandrel by torsion spring.
Further, the groove of the cover plate upper surface is annular groove.
Further, the cylinder, U-shaped hanger, torsion spring, rotary block, clamp lever, copper coin of putting away sports equipment are with cover plate central
It is symmetrical to be provided with two groups.
Further, the space is fan-shaped space, and quantity is twice.
Further, the flow tube top is provided with adpting flange.
Further, sealing gasket is provided between the cover plate and tank mouth.
The invention has the advantages that：
The present apparatus is simple in construction, be easy to manufacture, reduces production cost；Present apparatus applicable performance is strong, can be used for most liquid
The entrucking of type, different size tank mouth；The present apparatus improves the reliability of similar structures, for the entrucking of dangerous, harmful fluids,
Security is improved, environmental pollution is reduced.
The attachment structure of loading arm and tank mouth divide into four modules by the present apparatus, and excessively stream, gas collection exhaust, folder are realized respectively
Tightly, put away sports equipment four functions, design, manufacture by module, the design of whole device is reliable more than existing structure, simple, practical.Specifically
Show：
1. set of device can be used in clamping common all size tank mouth；
2. being provided using 2 general Standard Cylinders and clamping power, cost is low, easily manufactured；Contact point is symmetrically reliable；
3. loading arm and tank mouth attachment means are clamped out of tank mouth using lever construction；2 levers clamp four points, each clamping
The height and position of point with adjust automatically, can adapt to the various situations change of tank mouth；
4. using simple, novel structure of putting away sports equipment；
5. the composition of gas collecting jar with ground-on cover plate and flow tube is unique and practical.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
Fig. 2 is the present invention B-B direction schematic diagram that waist is splitted from gas collecting jar with ground-on cover plate.
Fig. 3 is present invention waist is splitted from cover plate for sealing pad D-D to schematic diagram.
Fig. 4 for structure of the present invention side A-A to schematic diagram（Clamp lever is in horizontal-clamping position）.
Fig. 5 is that structure of the present invention looks up partial schematic diagram from what mandrel center was splitted.
Fig. 6 for book inventive structure side A-A to schematic diagram（Clamp lever is in plummet curling position）.
Embodiment
The present invention is described further below in conjunction with the accompanying drawings：
As shown in figures 1 to 6, loading arm and tank mouth attachment means, including cover plate 2, it is characterised in that：Gas collection is installed on the cover plate 2
Cylinder 4 and cylinder 6, the side of gas collecting jar with ground-on cover plate 4 are provided with outlet flange 13, and the outlet flange 13 is used to connect gas recovery approach,
The top of the gas collecting jar with ground-on cover plate 4 is provided with cover 7；
The upper surface of cover plate 2, which is provided with groove, groove, installs gas collecting jar with ground-on cover plate 4, and the cover plate 2 is provided with screwed hole, and screwed hole is used to install
Through hole is provided with the middle of cylinder 6, the cover plate, flow tube is passed through from through hole, is provided between cover plate and the flow tube outer circumference surface
Space 31, space 31 is connected with gas collecting jar with ground-on cover plate 4；
Flow tube is provided with fanning strip 51 in the lower surface contact position of cover plate 2, and the top of flow tube 5 is provided with external screw thread, on screw thread
Round nut 9 can compress cover 7；
The piston rod lower surface of the cylinder 6 is equipped with U-shaped hanger 10, and the hollow part of U-shaped hanger 10 is equipped with mandrel 12, mandrel
Rotary block 14 and clamp lever 15 are filled on 12, the rotary block can be together with clamp lever around mandrel rotation；It is described
The lower surface of cover plate 2 is provided with the groove 161 in plummet direction, for folding and unfolding clamp lever provided with copper coin 16 of putting away sports equipment in the middle of copper coin 16 of putting away sports equipment.
Connected between the clamp lever 15 and mandrel 12 by torsion spring 11.The groove of the upper surface of cover plate 2 is annular groove.
The cylinder 6, U-shaped hanger 10, torsion spring 11, rotary block 14, clamp lever 15, copper coin 16 is put away sports equipment with the Central Symmetry of cover plate 2
Be provided with two groups.The space 31 is fan-shaped space, and quantity is twice.The flow tube top is provided with adpting flange 8；Institute
State and sealing gasket 3 is provided between cover plate 2 and tank mouth 1.
As the present apparatus is installed to tank mouth 1 by Fig. 1 modes（Non- present apparatus part）On, cover plate 2 pushes down tank mouth 1, cover plate 2
Sealing gasket 3 is provided between tank mouth 1, the upper surface of cover plate 2 is provided with annular groove, the built-in gas collecting jar with ground-on cover plate 4 of groove, and the side of gas collecting jar with ground-on cover plate 4 is provided with out
Gas flange 13, for connecting gas recovery approach, the top of gas collecting jar with ground-on cover plate 4 is provided with cover 7, and cover plate 2 is symmetrical provided with two
Screwed hole, is respectively used to install two identical Standard Cylinders 6, the centre of cover plate 2 is provided with through hole, and flow tube is passed through from through hole.
As shown in Fig. 2 being additionally provided with the fan-shaped space 31 of twice between cover plate 2 and the outer circumference surface of flow tube 5, produced during entrucking
Air-flow leaked by the space to gas collecting jar with ground-on cover plate 4.
As shown in Figure 1, Figure 3, flow tube 5 is provided with fanning strip 51 in the lower surface contact position of cover plate 2, and the top of flow tube 5 is provided with
Screw thread, the round nut 9 on screw thread can compress cover 7, and cover 7 compresses gas collecting jar with ground-on cover plate 4, and gas collecting jar with ground-on cover plate 4 pushes down cover plate 2, excessively stream
The support cover plate 2 of fanning strip 51 on pipe 5, flow tube 5, cover plate 2, gas collecting jar with ground-on cover plate 4, cover 7, round nut 9 are combined as one closely
It is overall.The top of flow tube 5 is provided with adpting flange 8, and whole devices are connected to the oil filling riser of loading arm.
As Figure 1 and Figure 4, the piston rod lower surface of cylinder 6 is equipped with U-shaped hanger 10, and the hollow part of U-shaped hanger 10 is filled
Have and rotary block 14 and clamp lever 15 filled on mandrel 12, mandrel 12, can be rotated on mandrel 12, the component of clamp lever 15 with
Connected between mandrel 12 by torsion spring 11, torsion spring 11, which is forced, makes the component of clamp lever 15 be relatively rotated around mandrel 12.Work as Standard Gases
When the piston rod of cylinder 6 is moved upwards up to certain position, torsion spring 11 forces rotary block 14 and clamp lever 15 to turn to horizontal level
Dynamic, when clamp lever 15 is turned to only slight beyond horizontal level, the contacts side surfaces of rotary block 14 and U-shaped hanger 10 make folder
Tight lever 15 and rotary block 14 can not be rotated further.The piston rod of cylinder 6 is continued to move up, and clamp lever 15 is kept substantially
Level, until with the lower surface contact of tank mouth 1, the both sides of clamp lever 15 are by whole attachment means firm grip in tank mouth 1
On.In 1 lower surface out-of-flatness of tank mouth, clamp lever 15 can be rotated around mandrel 12 and adjusted, and ensure lever within the specific limits
15 two ends and the lower surface reliable contacts of tank mouth 1.
As shown in Figure 1, Figure 4, Figure 5, the lower surface of cover plate 2 is provided with plummet side provided with copper coin 16 of putting away sports equipment in the middle of copper coin 16 of putting away sports equipment
To groove 161, when clamp lever 15 is horizontal, one side of clamp lever 15 is passed through from the groove, when the piston of cylinder 6
When bar promotion clamp lever component is moved down into certain position, one side lower surface and bottom surface of clamp lever 15 are in plummet
Direction is contacted, and the piston rod of cylinder 6 continues to press on clamp lever component and moved down, and copper coin 16 of putting away sports equipment can force clamp lever 15
Plumb position is turned to, as shown in Figure 6.
Standard Cylinder 6, hanger 10, torsion spring 11, folder rotary block 14, clamp lever 15, the copper coin 16 of putting away sports equipment of the present apparatus are equal
Provided with symmetrical two groups.
As shown in fig. 6, in the state of not entrucking, clamp lever 15 is constrained by copper coin 16 of putting away sports equipment, in plumb position.Dress
Che Shi, by cover plate partial insertion tank mouth 1 below 2, opens cylinder 6, two piston rods are moved upwards up to certain position, mandrel 12
Center line is higher than the bottom land of copper coin 16 height of putting away sports equipment, and rotary block 14 and clamp lever 15 are under the elastic force effect of torsion spring, to level
Direction is deployed, and piston rod continues to move up, when the bottom surface of clamp lever 15 exceedes the bottom land height for copper coin 16 of putting away sports equipment, two clamping thick sticks
Horizontal level is arrived in the flattening completely of bar 15.The piston rod of cylinder 6 is continued to move up, and drives clamp lever 15 to move up, clamp lever
15 basic holding levels, until the both sides with the lower surface contact of tank mouth 1, the driving clamp lever 15 of cylinder 6 will entirely be connected
Loading arm is tightly coupled by device firm grip in tank mouth 1 with tank mouth 1.Liquid enters lower section nanubrium through flow tube 5,
And then enter tank car；The escaping gas of generation enters gas collection through the fan-shaped space 31 between cover plate 2 and the outer circumference surface of flow tube 5
Cylinder 4, and then it is discharged into the gas recovery approach of outside.
After clamp lever 15 is flattened, it can continue to move up larger scope, can be filled to the tank mouth 1 of different depth
Car；The present apparatus can also carry out entrucking to the tank mouth 1 of different-diameter, and the distributing position of two groups of copper coins 16 of putting away sports equipment is determined being capable of entrucking
The minimum diameter of tank mouth 1, the length of clamp lever 15 determines the maximum gauge of tank mouth 1.
The foregoing is only a specific embodiment of the invention, but the protection domain of invention is not limited thereto, any to be familiar with sheet
The technical staff in field the invention discloses technical scope in, the change or replacement that can be readily occurred in, should all cover invention
Protection domain within.
Claims (7)
1. loading arm and tank mouth attachment means, including cover plate（2）, it is characterised in that：The cover plate（2）Upper installing gas collecting jar with ground-on cover plate（4）
And cylinder（6）, the gas collecting jar with ground-on cover plate（4）Side is provided with outlet flange（13）, the outlet flange（13）Reclaimed for connecting gas
Passage, the gas collecting jar with ground-on cover plate（4）Top be provided with cover（7）；
The cover plate（2）Upper surface, which is provided with annular groove, groove, installs gas collecting jar with ground-on cover plate（4）, the cover plate（2）Provided with screwed hole, screw thread
Hole is used to install cylinder（6）, the cover plate centre is provided with through hole, and flow tube is passed through from through hole, and the cover plate and flow tube are cylindrical
Space is provided between side face（31）, space（31）With gas collecting jar with ground-on cover plate（4）Connection；
Flow tube is in cover plate（2）Lower surface contact position is provided with fanning strip（51）, flow tube（5）Top is provided with external screw thread, mounted in spiral shell
Round nut on line（9）Cover can be compressed（7）；
The cylinder（6）Piston rod lower surface be equipped with U-shaped hanger（10）, U-shaped hanger（10）Hollow part be equipped with mandrel
（12）, mandrel（12）Upper dress rotary block（14）And clamp lever（15）, the rotary block can together with clamp lever around
Mandrel rotation；The cover plate（2）Lower surface is provided with copper coin of putting away sports equipment（16）, copper coin of putting away sports equipment（16）Centre is provided with the groove in plummet direction
（161）, for folding and unfolding clamp lever.
2. loading arm according to claim 1 and tank mouth attachment means, it is characterised in that：The clamp lever（15）With core
Axle（12）Between pass through torsion spring（11）Connection.
3. loading arm according to claim 1 and tank mouth attachment means, it is characterised in that：The cover plate（2）Upper surface
Groove is annular groove.
4. loading arm according to claim 1 or 2 and tank mouth attachment means, it is characterised in that：The cylinder（6）, U-shaped hangs
Ear（10）, torsion spring（11）, rotary block（14）, clamp lever（15）, copper coin of putting away sports equipment（16）With cover plate（2）It is centrosymmetric to set
There are two groups.
5. loading arm according to claim 1 and tank mouth attachment means, it is characterised in that：The space（31）To be fan-shaped
Space, and quantity is twice.
6. loading arm according to claim 1 and tank mouth attachment means, it is characterised in that：The flow tube top is provided with company
Acting flange（8）.
7. loading arm according to claim 1 and tank mouth attachment means, it is characterised in that：The cover plate（2）With tank mouth（1）
Between be provided with sealing gasket（3）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710495413.5A CN107128867B (en) | 2017-06-26 | 2017-06-26 | Connecting device for loading arm and tank opening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710495413.5A CN107128867B (en) | 2017-06-26 | 2017-06-26 | Connecting device for loading arm and tank opening |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107128867A true CN107128867A (en) | 2017-09-05 |
| CN107128867B CN107128867B (en) | 2023-03-14 |
Family
ID=59737034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710495413.5A Active CN107128867B (en) | 2017-06-26 | 2017-06-26 | Connecting device for loading arm and tank opening |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107128867B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110872094A (en) * | 2018-09-03 | 2020-03-10 | 中国石油化工股份有限公司 | Crane tube for unloading tank car and using method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103662487A (en) * | 2013-12-28 | 2014-03-26 | 连云港天邦科技开发有限公司 | Truck top locking type oil-gas recovery and sealing device |
| CN203728565U (en) * | 2013-12-31 | 2014-07-23 | 中国石油化工股份有限公司 | Oil gas recycling cover |
| CN105692539A (en) * | 2016-03-18 | 2016-06-22 | 连云港佳普石化机械有限公司 | Sealing vertical tube for loading arm |
| CN206050597U (en) * | 2016-08-10 | 2017-03-29 | 连云港佳普石化机械有限公司 | For the interior buckle-type sealing device of tank car closed loading |
| CN206927601U (en) * | 2017-06-26 | 2018-01-26 | 连云港宏泽机械设备有限公司 | Loading arm and tank mouth attachment means |
-
2017
- 2017-06-26 CN CN201710495413.5A patent/CN107128867B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103662487A (en) * | 2013-12-28 | 2014-03-26 | 连云港天邦科技开发有限公司 | Truck top locking type oil-gas recovery and sealing device |
| CN203728565U (en) * | 2013-12-31 | 2014-07-23 | 中国石油化工股份有限公司 | Oil gas recycling cover |
| CN105692539A (en) * | 2016-03-18 | 2016-06-22 | 连云港佳普石化机械有限公司 | Sealing vertical tube for loading arm |
| CN206050597U (en) * | 2016-08-10 | 2017-03-29 | 连云港佳普石化机械有限公司 | For the interior buckle-type sealing device of tank car closed loading |
| CN206927601U (en) * | 2017-06-26 | 2018-01-26 | 连云港宏泽机械设备有限公司 | Loading arm and tank mouth attachment means |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110872094A (en) * | 2018-09-03 | 2020-03-10 | 中国石油化工股份有限公司 | Crane tube for unloading tank car and using method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107128867B (en) | 2023-03-14 |
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