CN108914726A - A kind of magnetic floating traffic is low to set structure location track girder internode limit force transfer structure - Google Patents
A kind of magnetic floating traffic is low to set structure location track girder internode limit force transfer structure Download PDFInfo
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- CN108914726A CN108914726A CN201810966301.8A CN201810966301A CN108914726A CN 108914726 A CN108914726 A CN 108914726A CN 201810966301 A CN201810966301 A CN 201810966301A CN 108914726 A CN108914726 A CN 108914726A
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- track girder
- connecting rod
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- force transfer
- magnetic floating
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- 238000007667 floating Methods 0.000 title claims abstract description 23
- 238000004873 anchoring Methods 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 8
- 239000003566 sealing material Substances 0.000 claims description 6
- 244000025254 Cannabis sativa Species 0.000 claims description 3
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 3
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 3
- 235000009120 camo Nutrition 0.000 claims description 3
- 235000005607 chanvre indien Nutrition 0.000 claims description 3
- 239000011487 hemp Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000005339 levitation Methods 0.000 description 3
- 230000035772 mutation Effects 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 235000014121 butter Nutrition 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B25/00—Tracks for special kinds of railways
- E01B25/30—Tracks for magnetic suspension or levitation vehicles
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B25/00—Tracks for special kinds of railways
- E01B25/30—Tracks for magnetic suspension or levitation vehicles
- E01B25/305—Rails or supporting constructions
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Control Of Vehicles With Linear Motors And Vehicles That Are Magnetically Levitated (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of low structure location track girder internodes of setting of magnetic floating traffic to limit force transfer structure, between the track girder (4) of expansion joint two sides, including connecting rod (1) and casing (2), the connecting rod (1) is several, it includes being fixed on the anchoring section (101) in the middle part of the bottom plate of the track girder (4) of expansion joint side and the free segment (102) in the middle part of the bottom plate of the track girder (4) of the expansion joint other side, the anchoring section (101) and free segment (102) are structure as a whole, described sleeve pipe (2) is equally in the middle part of the bottom plate of the track girder (4) of the other side, and free segment (102) is sheathed in described sleeve pipe (2) and the track girder (4) joggle, for making the connecting rod (1) that there is the function along line direction free extension and the limit in other directions.Magnetic floating traffic of the invention is low to set structure location track girder internode limit force transfer structure, and relative settlement and protuberance can effectively be avoided to prevent stress from concentrating or occurring faulting of slab ends.
Description
Technical field
The invention belongs to track girder internodes to limit power transmission technical field, set knot more particularly, to a kind of magnetic floating traffic is low
Structure location track girder internode limits force transfer structure.
Background technique
Magnetic levitation track traffic engineering is very strict to Deformation control requirement, to ensure that low structure location track girder of setting does not occur
One of expansion joint, track girder is arranged in excessive temperature stress and differential settlement, the general every 10~30m of traditional track beam structure
Lower basis is the earth structure by rock and soil constitution, is influenced by factors such as landform, geological conditions, and quality is relatively not easy to control.
The low track girder for setting structure location is designed by beam on elastic foundation, and single-unit track girder is under self weight and Train induced load effect, track
Beam bottom stress distribution is unevenly the small saddle-shape in the big centre in both sides, and various unfavorable effect of natural environment, track girder are easy in addition
Differential settlement is generated, also inevitably will appear relative settlement between adjacent orbit beam, causes track girder to generate faulting of slab ends, to influence
The ride comfort of magnetic levitation track will affect the normal operation of levitation train when serious.
In the prior art, the low structure location track girder of setting of medium-and low-speed maglev is taken in track girder internode bottom setting limit plate
To solve the above problems.Patent CN204455725 discloses a kind of for the low of middle low speed magnetic suspension traffic engineering embankment location
It sets line construction, internode is used to misplace platen, i.e., structure identical with limit plate.But since limit plate and track girder are overlap joint
Connection, while it is larger to limit board size, so that there is rigidity mutation, beam-ends and limit plate lap-joint at limit plate in elastic foundation
There is biggish stress concentration phenomenon, lap-joint wears repeatedly under dynamic loading, generates unfavorable shadow to the durability of structure
It rings；The track girder natural frequency of vibration and the limit plate natural frequency of vibration are inconsistent, and during magnetic suspension train running, limit plate is influenced by dynamic load
Larger, discontinuity and there are repeated action moment of rupture is easy to appear fatigue damage and unfavorable deformation.Limit plate changes
The boundary condition of track girder beam on elastic foundation, has an adverse effect to the resistance to shock of track girder.In addition limit plate is only capable of controlling
Roadbed differential settlement deformation processed will fail in face of roadbed differential uplift deformation limit plate.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides that a kind of magnetic floating traffic is low to set structure location rail
Road beam internode limits force transfer structure, and several connecting rods are equipped between two adjacent sections track girder, and one end of connecting rod is solid for anchoring section
It is scheduled in the track girder of expansion joint side, the other end of connecting rod is free segment, in the track girder of the corresponding expansion joint other side
Equipped with casing, free segment and casing joggle make it have the function along line direction free extension, but play connecting rod other
The restriction in direction plays the role of transmission force while limit, so that foundation stress becomes more uniform under track girder,
Ground is avoided rigidity mutation and stress concentration phenomenon occur, it is ensured that not occur relative settlement and differential uplift between track girder, keep away
Exempt from track girder and faulting of slab ends occurs, while the transmitting effect of power will greatly improve the resistance to shock of track girder.
A kind of magnetic floating traffic provided by the invention is low to set structure location track girder internode limit force transfer structure, is set to expansion joint
Between the track girder of two sides, including connecting rod and casing；
The connecting rod is several, is spaced a distance horizontal Tile setting and, packet vertical with the expansion joint
Include the bottom plate for being fixed on the anchoring section in the middle part of the bottom plate of the track girder of expansion joint side and the track girder set on the expansion joint other side
The free segment at middle part, the anchoring section and free segment are structure as a whole；
Described sleeve pipe is equally set in the middle part of the bottom plate of the track girder of the other side, and the free segment is sheathed in described sleeve pipe
It is received with the track girder joggle for making the connecting rod that there is the function along line direction free extension with discharging track girder
The stress that contracting deformation and temperature rise temperature drop generate, while there is the transmitting effect of other directions limit and power, for avoiding difference
Sedimentation and protuberance prevent stress from concentrating or occurring faulting of slab ends.
Further, the end-enclosed of described sleeve pipe, and stayed between the end of the free segment and the end of described sleeve pipe
There is gap.
Further, the diameter of described sleeve pipe is 1~3mm bigger than the diameter of the connecting rod.
Further, the length of the connecting rod is greater than or equal to 0.8m.
Further, the diameter of the connecting rod is greater than or equal to 20mm.
Further, the spacing between the adjacent connecting rod is 20cm~50cm.
Further, joint sealing material is filled in the expansion joint.
Further, the joint sealing material is one or more of pitch plank, pitch hemp cut, bitumastic, polyurethane.
Further, lubriation material is coated in described sleeve pipe.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect：
(1) magnetic floating traffic of the invention is low sets structure location track girder internode limit force transfer structure, two adjacent sections track girder
Between be equipped with several connecting rods, one end of connecting rod is that anchoring section is fixed in the track girder of expansion joint side, connecting rod it is another
One end is free segment, and casing, free segment and casing joggle are equipped in the track girder of the corresponding expansion joint other side, makes it have edge
The function of line direction free extension, but the restriction in other directions of connecting rod is played, transmitting is played while limit
The effect of power avoids ground from rigidity mutation and stress concentration phenomenon occur so that foundation stress becomes more uniform under track girder,
Ensure do not occur relative settlement and differential uplift between track girder, avoid track girder that faulting of slab ends occurs, while improving the anti-of track girder
Vibration performance.
(2) magnetic floating traffic of the invention it is low set structure location track girder internode limit force transfer structure, the end-enclosed of casing,
There are the gaps of 2cm~3cm between the end of casing and the end of connecting rod free segment, and coating butter or other profits in casing
Sliding material is prevented with playing the protective action to free segment while ensuring the free segment of connecting rod along line direction free extension
Only free segment end generates excessive wear with casing when along line direction free extension.
(3) magnetic floating traffic of the invention is low sets structure location track girder internode limit force transfer structure, and the length of connecting rod is not
Preferably less than 0.8m, the diameter of connecting rod 1 are greater than or equal to 20mm, for guaranteeing connection between two adjacent sections track girder and power
Transmitting, in the range of spacing, using minor diameter transmission rod when, spacing gets the small value, using major diameter transmission rod when, spacing
It takes large values, to obtain the faulting of slab ends phenomenon of better anti-difference sedimentation and differential uplift generation.
Detailed description of the invention
Fig. 1 is that a kind of low structure location track girder internode of setting of magnetic floating traffic of the embodiment of the present invention limits the vertical disconnected of force transfer structure
Face schematic diagram；
Fig. 2 is that a kind of low structure location track girder internode of setting of magnetic floating traffic of the embodiment of the present invention limits the cross-section of force transfer structure
Face schematic diagram.
In all attached drawings, same label indicates identical structure or part, wherein：1- connecting rod, 2- casing, 3- joint filling material
Material, 4- track girder；101- anchoring section, 102- free segment.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below that
Not constituting conflict between this can be combined with each other.
Fig. 1 is that a kind of low structure location track girder internode of setting of magnetic floating traffic of the embodiment of the present invention limits the vertical disconnected of force transfer structure
Face schematic diagram.Fig. 2 is a kind of low cross set structure location track girder internode and limit force transfer structure of magnetic floating traffic of the embodiment of the present invention
Sectional schematic diagram.As shown in Fig. 1 and Fig. 2 figure, track girder form is the box beam of type tee section, and track girder can also be used solid
The forms such as beam, frame column beam, portal frame beam.As depicted in figs. 1 and 2, limit force transfer structure includes connecting rod 1 and casing 2, track
Beam 4 is extended along train direction of travel, and track girder 4 is equipped with track girder internode along the identical distance in train direction of travel interval
Expansion joint, expansion joint divides track girder 4 for several sections, with the deformation of adaptive temperature effect and load lower railway beam.
Preferably, the expansion joint of track girder bottom plate internode is preferably 2~3cm, is filled between seam using joint sealing material 3；Into one
Step ground, the waterproof materials such as the preferred pitch plank of joint sealing material 3, pitch hemp cut, bitumastic, polyurethane.
Several connecting rods 1 are equipped between two adjacent sections track girder, connecting rod 1 is set at the bottom plate of track girder 4 and connects phase
Adjacent two section track girders, several connecting rods 1 are spaced a distance setting, and connecting rod 1 is horizontally disposed and vertical with expansion joint, if
Involvement extension bar 1 is used to form connection between two adjacent sections track girder 4, convenient for carrying out power between expansion joint two sides track girder 4
Transmitting is being self-possessed to solve single-unit track girder under Train induced load and various unfavorable effect of natural environment, and track girder bottom is answered
Power is unevenly distributed uniform corvee sedimentation and generates faulting of slab ends offer basis；Spacing between adjacent two connecting rod 1 is excessive, and effect can be sharply
Weaken, too small then effect increase is no longer significant and uneconomical, the spacing in this programme between adjacent connecting rod 1 be 20cm~
50cm, to obtain best effect.
Preferably, steel, aluminium or other high-strength rigid material production can be used in connecting rod 1, wherein are made of steel
When, free segment should wait measures to carry out antirust treatment using zinc-plated, to ensure that connecting rod has enough durabilities.
Further, section is with smooth surface circle；Further, the length of connecting rod 1 is not preferably less than 0.8m, is used for
Guarantee the connection between two adjacent sections track girder 4 and the transmitting of power；Wherein, the diameter of connecting rod 1 is greater than or equal to 20mm, separately
Outside, the spacing between adjacent connecting rod 1 is chosen according to the diameter of connecting rod, in the range of spacing, using minor diameter
When transmission rod, spacing gets the small value, using major diameter transmission rod when, spacing takes large values.
Connecting rod 1 includes anchoring section 101 and free segment 102, and anchoring section 101 is set to the bottom of the track girder 4 of expansion joint side
In the middle part of plate, anchoring section 101 is fixedly connected with track girder 4；Free segment 102 is set in the bottom plate of the track girder 4 of the expansion joint other side
Portion, and casing 2 is equipped in the middle part of the bottom plate of the track girder 4 of the expansion joint other side, casing 2 is horizontally disposed, and casing 2 is fixed on track girder
In 4, free segment 102 is set in casing 2, and free segment 102 and 2 joggle of casing, and in 2 end of casing, there are clearance fits, make
It has the function along line direction free extension, the stress that releasable track girder shrinks deformation and temperature rise temperature drop generates；Together
When free segment 102 be set in casing 2, guarantee 102 other directions of free segment restriction, in addition the fixation of anchoring section 101
Connection, i.e. realization connecting rod 1 are only capable of flexible along line direction, remaining direction is consolidation constraint, play limit and the transmitting of power
Effect, the effective relative settlement for reducing two sides track girder and differential uplift, avoid between track girder section and section at expansion joint
There is faulting of slab ends, while can also effectively reduce Train induced load effect lower railway beam beam-ends dog-ear, beam-ends cracking is alleviated or avoided
And the lateral jackknifing near beam-ends, while the transmitting effect of power can effectively enhance the resistance to shock of track girder.
That is the anchoring section 101 of connecting rod 1 is fixedly connected with track girder 4, the free segment 102 and 4 tenon of track girder of connecting rod 1
It connects, to pass through the track girder 4 of 1 joint stitching two sides of connecting rod；Wherein, anchoring section 101 and the connection of free segment 102 form one
Body structure, so that foundation stress becomes more uniform under beam, shape of a saddle stress distribution becomes approximate distributed rectangular under beam,
To avoid ground from biggish stress concentration phenomenon occur.
Wherein, the diameter of casing 2 is 1~3mm bigger than the diameter of free segment 102, is flexibly connected by clearance fit, with equilibrium
Power between two adjacent sections track girder 4, the effective relative settlement for reducing two sides track girder and differential uplift.
Preferably, the end-enclosed of casing 2, and gap is equipped between 2 end of the end of free segment 102 and casing, into one
The step ground gap is 2cm~3cm, and the amount with restraint of liberty section 102 along line direction free extension is played to free segment 102 simultaneously
Protective action, prevent 102 end of free segment from directly contacting when along line direction free extension with track girder 4 and generate excessively
Abrasion.
Further, lubriation material is smeared in casing 2, butter is preferably but not limited to, for reducing free segment 102 and casing
Abrasion between 2.
There are the gap for being not less than 2cm, which is free segment in the end and track girder 4 of casing 2 for the end of casing 2
The distance between 102 end, to be applicable in the flexible of free segment 102.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, it is not used to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (9)
1. a kind of magnetic floating traffic is low to set structure location track girder internode limit force transfer structure, the track girder set on expansion joint two sides
(4) between, which is characterized in that including connecting rod (1) and casing (2)；
The connecting rod (1) be several, be spaced a distance horizontal Tile setting and it is vertical with the expansion joint comprising
The anchoring section (101) and the track girder set on the expansion joint other side being fixed in the middle part of the bottom plate of the track girder (4) of expansion joint side
(4) free segment (102) in the middle part of bottom plate, the anchoring section (101) and free segment (102) are structure as a whole；
Described sleeve pipe (2) is equally in the middle part of the bottom plate of the track girder (4) of the other side, and the free segment (102) is sheathed on institute
State in casing (2) with the track girder (4) joggle, for making the connecting rod (1) that there is the function along line direction free extension
Can, to discharge the stress that track girder shrinks deformation and temperature rise temperature drop generates, while there is the transmitting of other directions limit and power
Effect, for avoiding relative settlement and protuberance from preventing stress from concentrating or occurring faulting of slab ends.
2. a kind of magnetic floating traffic according to claim 1 is low to set structure location track girder internode limit force transfer structure, spy
Sign is, the end-enclosed of described sleeve pipe (2), and between the end of the free segment (102) and the end of described sleeve pipe there are
Gap.
3. a kind of magnetic floating traffic according to claim 1 or 2 is low to set structure location track girder internode limit force transfer structure,
It is characterized in that, the diameter of described sleeve pipe (2) is 1~3mm bigger than the diameter of the connecting rod (1).
4. a kind of magnetic floating traffic according to claim 1 is low to set structure location track girder internode limit force transfer structure, spy
Sign is that the length of the connecting rod (1) is greater than or equal to 0.8m.
5. a kind of magnetic floating traffic according to claim 1 or 4 is low to set structure location track girder internode limit force transfer structure,
It is characterized in that, the diameter of the connecting rod (1) is greater than or equal to 20mm.
6. a kind of magnetic floating traffic according to claim 5 is low to set structure location track girder internode limit force transfer structure, spy
Sign is that the spacing between the adjacent connecting rod (1) is 20cm~50cm.
7. a kind of magnetic floating traffic according to claim 1 is low to set structure location track girder internode limit force transfer structure, spy
Sign is, is filled with joint sealing material (3) in the expansion joint.
8. a kind of magnetic floating traffic according to claim 7 is low to set structure location track girder internode limit force transfer structure, spy
Sign is that the joint sealing material (3) is one or more of pitch plank, pitch hemp cut, bitumastic, polyurethane.
9. a kind of magnetic floating traffic according to claim 3 is low to set structure location track girder internode limit force transfer structure, spy
Sign is, is coated with lubriation material in described sleeve pipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810966301.8A CN108914726B (en) | 2018-08-23 | 2018-08-23 | Magnetic levitation traffic low-structure section rail Liang Jiejian limit force transmission structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810966301.8A CN108914726B (en) | 2018-08-23 | 2018-08-23 | Magnetic levitation traffic low-structure section rail Liang Jiejian limit force transmission structure |
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| Publication Number | Publication Date |
|---|---|
| CN108914726A true CN108914726A (en) | 2018-11-30 |
| CN108914726B CN108914726B (en) | 2024-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810966301.8A Active CN108914726B (en) | 2018-08-23 | 2018-08-23 | Magnetic levitation traffic low-structure section rail Liang Jiejian limit force transmission structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109572719A (en) * | 2018-12-26 | 2019-04-05 | 广州地铁设计研究院股份有限公司 | A kind of side hanging elevated rail traffic railway points system |
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| CN105821725A (en) * | 2016-04-29 | 2016-08-03 | 中铁第四勘察设计院集团有限公司 | Intra-segment limit structure for bearing-trail beams at double-line section of middle-low speed magnetic levitation traffic engineering low-laying line |
| CN105951535A (en) * | 2016-04-29 | 2016-09-21 | 中铁第四勘察设计院集团有限公司 | Inter-bearing rail beam limit structure of single-line section of middle-low speed magnetic levitation traffic engineering low-arranged line |
| CN205603974U (en) * | 2016-04-29 | 2016-09-28 | 中铁第四勘察设计院集团有限公司 | Low circuit single line location support rail girder segment limit structure within a definite time that puts of well low -speed maglev traffic engineering |
| DE102016001953A1 (en) * | 2016-02-19 | 2017-08-24 | Karl Gerhards | Fixed carriageways for railway bridges, their storage on and their connection to the bridge structures |
| CN208844374U (en) * | 2018-08-23 | 2019-05-10 | 中铁磁浮交通投资建设有限公司 | A kind of magnetic floating traffic is low to set structure location track girder internode limit force transfer structure |
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- 2018-08-23 CN CN201810966301.8A patent/CN108914726B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016001953A1 (en) * | 2016-02-19 | 2017-08-24 | Karl Gerhards | Fixed carriageways for railway bridges, their storage on and their connection to the bridge structures |
| CN105821725A (en) * | 2016-04-29 | 2016-08-03 | 中铁第四勘察设计院集团有限公司 | Intra-segment limit structure for bearing-trail beams at double-line section of middle-low speed magnetic levitation traffic engineering low-laying line |
| CN105951535A (en) * | 2016-04-29 | 2016-09-21 | 中铁第四勘察设计院集团有限公司 | Inter-bearing rail beam limit structure of single-line section of middle-low speed magnetic levitation traffic engineering low-arranged line |
| CN205603974U (en) * | 2016-04-29 | 2016-09-28 | 中铁第四勘察设计院集团有限公司 | Low circuit single line location support rail girder segment limit structure within a definite time that puts of well low -speed maglev traffic engineering |
| CN208844374U (en) * | 2018-08-23 | 2019-05-10 | 中铁磁浮交通投资建设有限公司 | A kind of magnetic floating traffic is low to set structure location track girder internode limit force transfer structure |
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| CN109572719A (en) * | 2018-12-26 | 2019-04-05 | 广州地铁设计研究院股份有限公司 | A kind of side hanging elevated rail traffic railway points system |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108914726B (en) | 2024-03-15 |
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