CN206667033U - Bridge bolts the safeguard structure of system - Google Patents
Bridge bolts the safeguard structure of system Download PDFInfo
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- CN206667033U CN206667033U CN201621478981.1U CN201621478981U CN206667033U CN 206667033 U CN206667033 U CN 206667033U CN 201621478981 U CN201621478981 U CN 201621478981U CN 206667033 U CN206667033 U CN 206667033U
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- safeguard structure
- bolt
- bridge
- coating
- rubbing surface
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- 238000000576 coating method Methods 0.000 claims abstract description 57
- 239000011248 coating agent Substances 0.000 claims abstract description 55
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 21
- 239000007921 spray Substances 0.000 claims abstract description 20
- 239000011159 matrix material Substances 0.000 claims abstract description 18
- 239000004589 rubber sealant Substances 0.000 claims abstract description 15
- 238000004073 vulcanization Methods 0.000 claims abstract description 6
- 238000003032 molecular docking Methods 0.000 claims abstract description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 20
- 229910052725 zinc Inorganic materials 0.000 claims description 20
- 239000011701 zinc Substances 0.000 claims description 20
- 239000000565 sealant Substances 0.000 claims description 12
- 239000004526 silane-modified polyether Substances 0.000 claims description 10
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 6
- XUDNJARNPKNDSJ-UHFFFAOYSA-N [Ti].[Cu].[Zn] Chemical compound [Ti].[Cu].[Zn] XUDNJARNPKNDSJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 13
- 238000005260 corrosion Methods 0.000 abstract description 12
- 230000007797 corrosion Effects 0.000 abstract description 8
- 239000010410 layer Substances 0.000 description 21
- 238000000034 method Methods 0.000 description 16
- 238000010276 construction Methods 0.000 description 12
- 230000001965 increasing effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000004078 waterproofing Methods 0.000 description 6
- 238000005507 spraying Methods 0.000 description 5
- 229910000635 Spelter Inorganic materials 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 238000010422 painting Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000007751 thermal spraying Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 238000004210 cathodic protection Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Bridges Or Land Bridges (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The utility model discloses a kind of safeguard structure of bridge bolt system, including steel matrix rubbing surface safeguard structure, bolt safeguard structure and junction safeguard structure；Steel matrix rubbing surface safeguard structure is in friction surface cover（2）Upper outer lower face surface and rubbing surface core plate（1）Outer surface and friction surface cover（2）Thermal spray metal layer is attached with relative region（3）, each thermal spray metal layer（3）On be attached with nonskid coating（4）；Bolt safeguard structure is in bolt（5）Outer surface to rub surface cover（2）Vulcanizable rubber sealant is wrapped up at the gap that outer surface connects（6）；Junction safeguard structure is in rubbing surface core plate（1）The junction gap that end docking forms（7）And friction surface cover（2）End to rubbing surface core plate（1）Equal filling and vulcanization type rubber sealant at the gap that outer surface connects（6）.So as to improve the corrosion resistance of bridge and sealing, bridge life is effectively extended.
Description
Technical field
A kind of safeguard structure of bridge bolt system is the utility model is related to, belongs to bridge long-life technical field of anticorrosion.
Background technology
In bridge construction, steel structural bridge is played due to the performance advantage of itself in highway and railroad bridge construction
Unique effect, especially itself is light, load resistant power is strong, the manufacturing cycle is short, installation facility, and can realize low-angle scissors crossing
The features such as bolted and welded girder Steel Bridge obtained being widely applied very much.As shown in figure 1, existing highway bridge bolt system includes rubbing surface core
Plate（1）, friction surface cover（2）And high-strength bolt（5）, two pieces of rubbing surface core plates（1）End splicing, and top and bottom of junction
On be covered each by a friction surface cover（2）, and pass through uniform high-strength bolt（5）It is fixed together.Bolted and welded girder Steel Bridge is built,
Construction of the connection to whole bridge between Qi Liang and beam plays very important effect.In order to reliably be connected, except making
With outside high intensity Special connecting bolt, the antiseptic property and resistant slide ability of girder steel joint face are improved, i.e., how to increase joint face
The anti-corrosion time limit and coefficient of friction turn into the key technology for improving rubbing surface connection reliability.
In professional standard TB/T 1527-2004《Railway steel bridge protects application》In, it is proposed that utilize thermal spraying aluminum or inorganic
The method of zinc-rich antirust non-skid coating, prepares the Coating of increasing friction of bolted and welded girder Steel Bridge joint face, and specific coating specification is：Using electricity
Arc sprays aluminium, and coating layer thickness is 150 ± 50 μm, or uses inorganic zinc-rich antirust non-skid coating, and coating layer thickness is 120 ± 40 μm of paintings
The anti-slip coefficient of layer is not less than 0.550, and the exposed aluminium surface of rod member bolt point, inorganic zinc-rich antirust non-skid coating surface are with applying
The special epoxy zinc-rich anti-corrosive primer of application is answered by material coating lap-joint.After girder steel assembling, the exposed aluminized coating of bolt point uses epoxy
Seal coat carries out sealing of hole, sealing of hole thickness degree no requirement (NR), should coat seal coat to not being absorbed as stopping；Painting should be added corresponding after sealing of hole
Matched coating.Application epoxy zinc-rich anti-corrosive primer at bolt point bolt, bolt head, application front bolt answer oil removing, nut and pad
It should wash and remove saponification film.
Meng Lixin etc.（Research [J] sufacings of Steel Bridge joint face Coating of increasing friction technology of preparing, August the 33rd in 2004
Rolled up for the 4th phase）The electric arc spraying of spelter coating is first carried out in pretreated substrate surface, the spraying of aluminized coating is then carried out, makes base
Material surface is formed using zinc as bottom, and aluminium is the composite coating of face coat.Wherein 40-80 μm of spelter coating thickness, spelter coating spraying
The electric arc spraying process parameter constant of the spraying aluminized coating of aluminized coating on spelter coating surface should be carried out in 1h afterwards, coating layer thickness is
80-110μm.Bottom spray zinc can strengthen the corrosion protection to steel substrate, mitigate sprayed-on Al layer because concrete dynamic modulus is easily corroded by aqueous vapor
Corrosion is produced in coating bottom and carries out Test of Friction measure the defects of destroy anchoring strength of coating, after process modification, is obtained
It is 0.802 to the average arithmetic value of coating coefficient of friction, meets relevant criterion requirement, achieve preferable application effect.
Above-mentioned prior art, positive increasing is all achieved in actual applications and is rubbed effect, but rubbing surface anti-corrosive properties be present
The major defect of energy and sealing property deficiency.Single inorganic zinc-rich layer and sprayed-on Al layer, which either spray zinc sprayed-on Al layer, can not all meet
The long-lasting protection requirement of Steel Bridge.Zinc sprayed-on Al layer is such as sprayed, as seasonal variations steel part is flexible and bridge floor vibration influence, high-strength bolt
Exposed face and rubbing surface edge coating can be exposed in environment.Due to the sealing at high-strength bolt exposed face and rubbing surface edge compared with
Difference, corrosive medium can rapidly permeate into coating and be corroded and constantly corrode steel substrate, cause rubbing surface coating adhesion to decline,
So as to lose the increasing effect of rubbing.And because existing individually inorganic zinc-rich layer either sprays zinc sprayed-on Al layer with sprayed-on Al layer, its thickness connects
Nearly 200 μm, during long service, bridge is in continuous stress variation so that coating layer thickness is acted on not due to creep
Disconnected to reduce, so as to cause high-strength bolt to loosen, the operation to bridge produces very big potential safety hazard.
To sum up, existing Coating of increasing friction can not meet Steel Bridge 100 years or even the technology in 120 years life-spans used above will
Ask, therefore urgently improve.
Utility model content
For above-mentioned existing technical problem, the utility model offer one kind is simple in construction, anti-slip coefficient is high, corrosion resistance
The safeguard structure of excellent, good airproof performance the bridge bolt system of energy, to improve the increasing of rubbing surface mill effect, extends the anti-corrosion of rubbing surface
The time limit, the sealing and water proofing property of bolt system are improved, so as to extend the service life of bridge bolt system.
To achieve the above object, the utility model provides a kind of safeguard structure of bridge bolt system, including steel matrix is rubbed
Wiping face safeguard structure, bolt safeguard structure and junction safeguard structure.
The steel matrix rubbing surface safeguard structure is upper outer lower face surface and rubbing surface the core plate appearance in friction surface cover
Face is attached with thermal spray metal layer on the region relative with friction surface cover, and is attached with each thermal spray metal layer anti-skidding
Coating；
The bolt safeguard structure is to be wrapped up at bolt outer surface to the gap to connect with friction surface cover outer surface
Vulcanizable rubber sealant；
The junction safeguard structure is in the junction gap that the docking of rubbing surface core plate end forms and friction cover
Equal filling and vulcanization type rubber sealant at plate end to the gap to connect with rubbing surface core plate outer surface.
Further, described vulcanizable rubber sealant coating uses silane modified polyether sealant.
Further, described thermal spray metal coating is zinc-copper-titanium alloy metal coating.Further, the thickness of the coating
For 80-100 μm.
Further, described nonskid coating is the inorganic zinc-rich nonskid coating with inorganic zinc-rich antirust non-skid coating application.
Further, the thickness of the coating is 80-120 μm.
Compared with prior art, the utility model has the following advantages that：
（1）The thermal spraying zinc-copper-titanium alloy material on bridge bolt system steel matrix rubbing surface outer surface, the metal coating
Corrosion resisting property it is good, anti-slip coefficient is high, coating porosity is low, can to bridge bolt system steel matrix rubbing surface play protection
Effect；In the metal coating surface application inorganic zinc-rich antirust non-skid coating, space caused by metal coating can be closed, enters one
Step isolation corrosive medium, and anti-slipping property energy can be increased.
（2）In bridge bolt system bolt exposed surface parcel vulcanizable rubber sealant, avoid in bridge military service process
In, corrosive medium and steam enter bolt system friction face steel matrix by the gap of bolt exposed surface, improve bolt system
The sealing and water proofing property of system.
（3）Vulcanizable rubber sealant coating is wrapped up and filled using silane modified polyether sealant, and existing
Sealant, which is compared, following characteristics：1. the silane modified polyether sealant is one-component, it is not necessary to scene mixing, avoids scene
The problems such as project progress caused by confusion is slow, mixing is uneven, micro-bubble；2. the silane modified polyether sealant 100% contains admittedly
Amount, has no irritating odor, environmentally friendly；3. the silane modified polyether sealant adhesive force reaches 7.0KN/m, adhesion performance
It is more excellent；4. the elongation at break of the silane modified polyether sealant is 450%~700%, its elasticity is substantially better than polysulfide rubber
Sealant；5. the density of the silane modified polyether sealant is smaller, bridge load can be under equal conditions reduced, is had well
Workability, elastic performance and sealing property, it can effectively ensure construction quality.
（4）In bridge bolt system steel matrix rubbing surface junction filling and vulcanization type rubber sealant, avoid taking in bridge
During labour, corrosive medium and steam enter bolt system steel matrix rubbing surface by bolting the gap of system junction, improve
The sealing and water proofing property of bolt system.
In summary, the utility model composite construction totally improves the corrosion resistance and sealing of bridge, effectively extends
The service life of bridge.
Brief description of the drawings
Fig. 1 is the structural representation of existing highway bridge bolt system；
Fig. 2 is the utility model bridge bolt systematic protection structural representation；
Fig. 3 is the decomposing schematic representation of steel matrix rubbing surface safeguard structure；
In figure：1st, rubbing surface core plate, 2, friction surface cover, 3, thermal spray metal layer, 4, nonskid coating, 5, bolt, 6, sulphur
Change type rubber sealant, 7, junction gap.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.
Embodiment 1：The construction process of the safeguard structure application of this bridge bolt system.
1-1, system application steel matrix rubbing surface safeguard structure is bolted to bridge in factory, process is as follows：
1-1-1, steel matrix rubbing surface core plate 1 and friction surface cover 2 are bolted to Steel Bridge using derusting by sandblasting mode first
Carry out surface cleaning processing so that the surface cleanness of rubbing surface core plate 1 and friction surface cover 2 after processing reaches Sa3 levels, table
Surface roughness reaches Rz60-80 μm；
1-1-2, friction surface cover 2 the upper outer surface of outer lower face surface and rubbing surface core plate 1 with friction the phase of surface cover 2
To region on to adhere to thickness be 80 μm of thermal spray metal layer 3, i.e., spray to form zinc-copper-titanium alloy painting using thermal spraying apparatus
Layer, this layer of adhesive force is more than 10MPa, anti-slip coefficient is more than 0.808, and salt-fog resistant time is more than 2000h, more than national related mark
Alignment request.
1-1-3, throughout adhere to the nonskid coating 4 that thickness is 80 μm on thermal spray metal layer 3 respectively, i.e., using inorganic richness
The application of zinc antirust non-skid coating together or twice inorganic zinc-rich antirust nonskid coating 4.
As shown in figure 3, the steel matrix rubbing surface safeguard structure that above-mentioned operation obtains has excellent adhesive force, good physical
Mechanical performance and long-acting, excellent anti-corrosion capability, it is ensured that joint face, which has, stablizes lasting frictional force, realizes that Steel Bridge connects
The reliability connect, extend the service life of steel structure bridge.
1-2, carry out anti-corrosion protection to bolt 5 stubborn eventually at the construction field (site), application bolt safeguard structure, process is as follows：
1-2-1, first, rubbing surface core plate 1 and friction surface cover 2 have been carried out above-mentioned metal coating+paint coatings and prevented
Shield, after the completion for the treatment of that bolt 5 is twisted eventually, punished in exposed surface to the gap to connect with friction surface cover 2 outer surface of each bolt 5
Not Bao Guo vulcanizable rubber sealant 6, i.e., using silane modified polyether sealant, obtain bolt safeguard structure, as shown in Figure 2.
In this way, just avoiding extraneous steam by entering to bolt space in bolt system, bolt system further increasing
Sealing and water proofing property.
1-3, application junction safeguard structure, process are as follows in Cheng Qiaohou or after the completion of mating formation：
1-3-1, the junction gap 7 formed and friction surface cover 2 end are being docked in the end of rubbing surface core plate 1 extremely
Vulcanizable rubber sealant 6 is smeared at the gap to connect with the outer surface of rubbing surface core plate 1, forms junction safeguard structure, such as
Shown in Fig. 3.In this way, the steam for just avoiding the external world passes through steel matrix rubbing surface junction gap 7 and friction surface cover 2 end
Enter at portion to the gap to connect with the outer surface of rubbing surface core plate 1 in bolt system, further increasing the close of bolt system
Envelope property and water proofing property.
Embodiment 2：The construction process of the safeguard structure application of this bridge bolt system.
2-1, steel matrix rubbing surface safeguard structure is completed in factory, process is different with the step 1-1 in embodiment 1
It is that the thickness of thermal spray metal layer 3 is 90 μm, the thickness that nonskid coating 4 is adhered on thermal spray metal layer 3 is 100 μm.
2-2, at the construction field (site) bolt safeguard structure, process is the same as the step 1-2 in embodiment 1.
2-3, junction safeguard structure of constructing in Cheng Qiaohou or after the completion of mating formation, process is the same as the step 1- in embodiment 1
3。
Embodiment 3：The construction process of the safeguard structure application of this bridge bolt system.
3-1, steel matrix rubbing surface safeguard structure is completed in factory, process is different with the step 1-1 in embodiment 1
It is that the thickness of thermal spray metal layer 3 is 100 μm, the thickness that nonskid coating 4 is adhered on thermal spray metal layer 3 is 120 μm.
3-2, at the construction field (site) bolt safeguard structure, process is the same as the step 1-2 in embodiment 1.
3-3, junction safeguard structure of constructing in Cheng Qiaohou or after the completion of mating formation, process is the same as the step 1- in embodiment 1
3。
Zinc-copper-titanium alloy material, inorganic zinc-rich antirust non-skid coating, vulcanizable rubber needed for above-described embodiment 1-3 is close
Device therefor in the raw material such as agent and work progress is sealed, can be directly in market purchasing.Zinc-copper-titanium alloy material used can be adopted
DZ-ZCT3 × 100 produced with Jiangsu Zhongkuangdazheng Surface Engineering Techn Co., Ltd., its corrosion resisting property is excellent, anti-slip coefficient
It is high, higher with the adhesive force of rubbing surface core plate 1, friction surface cover 2 and paint coatings.Silane modified polyether sealant used can
The DZ-MS330 products produced using Jiangsu Zhongkuangdazheng Surface Engineering Techn Co., Ltd., belong to environmentally friendly machine, one-component,
Density is small, adhesive force and elastic performance are more excellent.
In a word, the utility model combines thermal spray metal layer with nonskid coating, to rubbing surface core plate 1 and rubbing surface
Cover plate 2 has good closed effect, and existing excellent adhesive force acts on cathodic protection, has corrosion-resistant slide-resistant to ensure resistant slide again
The effect of coefficient, the erosion of corrosive medium can be effectively prevented, ensure that bolt system joint face has and stablize lasting frictional force, it is real
The reliability of existing bridge steel structure connection.Also, at the outer surface of bolt 5, junction gap 7, friction surface cover 2 both ends to friction
The outer surface joint of face core plate 1 wrap up respectively with filling and vulcanization type rubber sealant, avoid steam by screwed joint, rub
The space that the junction gap 7 of wiping face core plate 1, rubbing surface core plate 1 connect with friction surface cover 2 enters bolt system, improves bolt
The sealing water proofing property of welding system.
Claims (6)
1. a kind of safeguard structure of bridge bolt system, it is characterised in that protected including steel matrix rubbing surface safeguard structure, bolt
Structure and junction safeguard structure；
The steel matrix rubbing surface safeguard structure is in friction surface cover（2）Upper outer lower face surface and rubbing surface core plate（1）Outside
Surface and friction surface cover（2）Thermal spray metal layer is attached with relative region（3）, and each thermal spray metal layer（3）On
It is attached with nonskid coating（4）；
The bolt safeguard structure is in bolt（5）Outer surface to rub surface cover（2）Wrapped at the gap that outer surface connects
Wrap up in vulcanizable rubber sealant（6）；
The junction safeguard structure is in rubbing surface core plate（1）The junction gap that end docking forms（7）And rubbing surface
Cover plate（2）End to rubbing surface core plate（1）Equal filling and vulcanization type rubber sealant at the gap that outer surface connects（6）.
A kind of 2. safeguard structure of bridge bolt system according to claim 1, it is characterised in that described vulcanization type rubber
Glue sealant（6）Using silane modified polyether sealant.
A kind of 3. safeguard structure of bridge bolt system according to claim 1 or 2, it is characterised in that described thermal jet
Matel coated layer（3）For zinc-copper-titanium alloy metal coating.
A kind of 4. safeguard structure of bridge bolt system according to claim 3, it is characterised in that described thermal jet oil gidling
Belong to layer（3）Thickness be 80-100 μm.
5. the safeguard structure of a kind of bridge bolt system according to claim 1 or 2, it is characterised in that described is anti-skidding
Coating（4）For with the inorganic zinc-rich nonskid coating of inorganic zinc-rich antirust non-skid coating application.
A kind of 6. safeguard structure of bridge bolt system according to claim 5, it is characterised in that described nonskid coating
（4）Thickness be 80-120 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621478981.1U CN206667033U (en) | 2016-12-30 | 2016-12-30 | Bridge bolts the safeguard structure of system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621478981.1U CN206667033U (en) | 2016-12-30 | 2016-12-30 | Bridge bolts the safeguard structure of system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206667033U true CN206667033U (en) | 2017-11-24 |
Family
ID=60356948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621478981.1U Active CN206667033U (en) | 2016-12-30 | 2016-12-30 | Bridge bolts the safeguard structure of system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206667033U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112129929A (en) * | 2020-09-30 | 2020-12-25 | 重庆百信实业有限公司 | Method for detecting comprehensive performance of track coating |
-
2016
- 2016-12-30 CN CN201621478981.1U patent/CN206667033U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112129929A (en) * | 2020-09-30 | 2020-12-25 | 重庆百信实业有限公司 | Method for detecting comprehensive performance of track coating |
| CN112129929B (en) * | 2020-09-30 | 2022-11-15 | 重庆百信实业有限公司 | Method for detecting comprehensive performance of track coating |
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