CN204309331U - A kind of bullet train floor - Google Patents
A kind of bullet train floor Download PDFInfo
- Publication number
- CN204309331U CN204309331U CN201420006205.6U CN201420006205U CN204309331U CN 204309331 U CN204309331 U CN 204309331U CN 201420006205 U CN201420006205 U CN 201420006205U CN 204309331 U CN204309331 U CN 204309331U
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- Prior art keywords
- floor
- board
- layer
- expanded vermiculite
- pressure
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- 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.)
- Expired - Lifetime
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- 229910052902 vermiculite Inorganic materials 0.000 claims abstract description 56
- 235000019354 vermiculite Nutrition 0.000 claims abstract description 56
- 239000010455 vermiculite Substances 0.000 claims abstract description 56
- 239000002131 composite material Substances 0.000 claims abstract description 20
- 239000004568 cement Substances 0.000 claims abstract description 18
- 239000000835 fiber Substances 0.000 claims abstract description 18
- 239000004744 fabric Substances 0.000 claims abstract description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 10
- 239000000853 adhesive Substances 0.000 claims description 26
- 230000001070 adhesive effect Effects 0.000 claims description 26
- 238000009413 insulation Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 231100000252 nontoxic Toxicity 0.000 abstract description 3
- 230000003000 nontoxic effect Effects 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000005245 sintering Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 51
- 239000003795 chemical substances by application Substances 0.000 description 30
- 239000004033 plastic Substances 0.000 description 24
- 238000010438 heat treatment Methods 0.000 description 18
- 238000003756 stirring Methods 0.000 description 18
- 239000000463 material Substances 0.000 description 15
- 239000003292 glue Substances 0.000 description 12
- 238000005507 spraying Methods 0.000 description 12
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 235000013358 Solanum torvum Nutrition 0.000 description 6
- 240000002072 Solanum torvum Species 0.000 description 6
- 239000004567 concrete Substances 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 238000004078 waterproofing Methods 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 5
- 239000003063 flame retardant Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000002341 toxic gas Substances 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- 239000011120 plywood Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 244000274847 Betula papyrifera Species 0.000 description 1
- 235000009113 Betula papyrifera Nutrition 0.000 description 1
- 235000009109 Betula pendula Nutrition 0.000 description 1
- 235000010928 Betula populifolia Nutrition 0.000 description 1
- 235000002992 Betula pubescens Nutrition 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241000271559 Dromaiidae Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
Landscapes
- Building Environments (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Road Paving Structures (AREA)
Abstract
The utility model relates to a kind of preparation method of composite floor board, and particularly a kind of bullet train floor, belongs to composite floor board field.This composite floor board is layer structure, can be divided into five layers.Intermediate layer is the structure sheaf be made up of expanded vermiculite fireproof heated board; The upper and lower faces of this structure sheaf is the enhancement layer be made up of stainless steel wire crimped wire mesh; Enhancement layer is outward fiber cement board pressure; The surface of the one deck in two-layer fiber cement board pressure is bonded with rubber floor covering cloth; This floor, structure sheaf adopts the expanded vermiculite fireproof heated board of light fire-proof, and the fire-resistance capacity of expanded vermiculite fireproof heated board is more than 1100 DEG C, and fire protecting performance can reach A1 level, smokeless during high temperature sintering, nontoxic.Not only can increase substantially the flameproof effect on floor, serve again effect that is heat insulation, sound insulation, particularly alleviate the overall weight on floor.
Description
Technical field
The utility model relates to a kind of preparation method of composite floor board, and particularly a kind of bullet train floor, belongs to composite floor board field.
Background technology
At present, speed per hour reaches the bullet train of more than 200km/h, and what floor adopted is wooden flame-retardant plywood, and it is made up of surface layer and core.Surface layer is white birch wood and softwood blend laminate, and core is puigging.Its shortcoming is: though floor is through special fire prevention process, be wood materials after all, when fire occurs, will soon burn.Owing to the addition of a large amount of fire retardants, when flame-retardant plywood burns, CO, HCN, NO can be discharged
2deng toxic gas, very large to harm.The adhesive that glued board uses is Lauxite, and in adhesive, the formaldehyde of unreacted formaldehyde or not corresponding formation methylene, remains in flaggy, and deposit with in use procedure at glued board, free formaldehyde can constantly diffuse out.Glued board proportion is comparatively large, is unfavorable for the speed-raising of vehicle, and the noise produced for vehicle and vibrations do not have good soundproof effect.
Utility model content
The purpose of this utility model is the problems referred to above existed to solve existing bullet train floor, provides a kind of bullet train floor, and this floor is a kind of light weight, fire prevention, the bullet train floor that heat insulation, nontoxic, soundproof effect is good.
The purpose of this utility model is achieved through the following technical solutions.
A kind of bullet train floor, this composite floor board is layer structure, can be divided into five layers.Intermediate layer is the structure sheaf be made up of expanded vermiculite fireproof heated board; The upper and lower faces of this structure sheaf is the enhancement layer be made up of stainless steel wire crimped wire mesh; Enhancement layer is outward fiber cement board pressure; The surface of the one deck in two-layer fiber cement board pressure is bonded with rubber floor covering cloth; Be fixedly connected with by adhesive between each composite bed;
The both sides of described floor main body are arranged with tenon or groove, fixing when being convenient to floor splicing.
It is the expanded vermiculite small powder (particle diameter 1 ~ 3mm) of 50% ~ 70%, inorganic adhesive, the curing agent of 2% ~ 3%, the waterproofing agent of 1.5% ~ 2.5% of 30% ~ 50% that described expanded vermiculite fireproof heated board comprises weight ratio.
The preparation method of described expanded vermiculite fireproof heated board, concrete steps are as follows:
1) expanded vermiculite small powder is fed intake in blender, then curing agent is sprinkling upon equably on expanded vermiculite small powder, stir; Open glue spraying valve, spray inorganic adhesive while stirring, after glue spraying, continue to stir;
2) mould is prepared on the guide rail pre-set, load onto locator bar.At the bottom of mould, the smooth plastic plate of pad upper surface, and on plastic plate brush one deck releasing agent.Pour in mould by the material stirred, strike off by hand, surface repaves the plastic plate that one deck has brushed releasing agent.
3) push in hydraulic press zone of heating by mould along guide rail, adjustment mould, in press centre, then slowly goes up booster, till making pressure reach 12MPa.After press pressure is stable, stop, remain on 145 ~ 150 DEG C of heating under this pressure condition.
4) loose pressure machine, ejection die, will slightly press vermiculite board to carry out heating curing in press after moving back mould.The complete vermiculite board of maintenance is steadily released, and throws off plastic plate, vermiculite board is carried out sanding in time being slowly down to normal temperature, and cuts by the size of regulation.
Described rubber floor covering cloth is the floor cloth that the bullet train such as domestic EMUs and subway uses.
Described adhesive is organic siliconresin class adhesive, the organic siliconresin class adhesive that the bonding of the bonding between all sheet material and rubber floor covering cloth all uses.
Beneficial effect
1, a kind of bullet train floor of the present utility model, structure sheaf adopts the expanded vermiculite fireproof heated board of light fire-proof, and the fire-resistance capacity of expanded vermiculite fireproof heated board is more than 1100 DEG C, and fire protecting performance can reach A1 level, smokeless during high temperature sintering, nontoxic.Not only can increase substantially the flameproof effect on floor, serve again effect that is heat insulation, sound insulation, particularly alleviate the overall weight on floor;
2, a kind of bullet train floor of the present utility model, enhancement layer adopts the thick stainless steel wire crimped wire mesh of 0.6mm of high-strength light, can improve bending strength and the impact strength of product;
3, a kind of bullet train floor of the present utility model, outermost layer is fiber cement board pressure, and fire protecting performance can reach A1 level, does not produce toxic gas during high temperature sintering.Intensity is high, lightweight, do not break, do not wreck, shock resistance is high.Soundproof effect is good, and thermal conductivity factor is low, and heat preservation and insulation is good.Can carry out as required cutting, hole, carve, stickup etc.;
4, a kind of bullet train floor of the present utility model, organic siliconresin class adhesive is one-component, translucent paste body shape, and cold curing, adhesive strength is high.Not heat release during burning, releases without nuisance, good weatherability.
Accompanying drawing explanation
Fig. 1 is bullet train floor of the present utility model section structure schematic diagram.
Fig. 2 is bullet train land used slab integral structural representation of the present utility model.
In figure: 1-expanded vermiculite fireproof heat insulating flaggy, 2-stainless steel wire crimped wire mesh enhancement layer, 3-fiber cement board pressure layer, 4-rubber floor covering layer of cloth.
Detailed description of the invention
The utility model is described in further detail for the embodiment provided below in conjunction with accompanying drawing.
Embodiment 1
The bullet train composite floor board that the present embodiment provides is layer structure, and its intermediate layer 1 is expanded vermiculite fireproof heated board, and thickness is 13mm; The above and below in intermediate layer 1 is stainless steel wire crimped wire mesh enhancement layer 2, and thickness is 0.6mm; Enhancement layer 2 surperficial bondable fibers cement pressure plate layer 3, thickness is 3mm; A sticking rubber floor layer of cloth 4 of fiber cement board pressure layer 3, thickness is 2mm; Gross thickness is 22.2mm.Bullet train floor of the present utility model, integral manufacturing is shaping, and all sheet material is by organic siliconresin class adhesive compound, and cold pressing 12h under the pressure of 5MPa.The side of floor main body is provided with tenon 5, and opposite side is provided with groove 6.
The described method preparing expanded vermiculite fireproof heated board, concrete steps are as follows:
1) 20kg expanded vermiculite, 12kg inorganic adhesive, 0.80kg curing agent and 0.64kg waterproofing agent is taken, for subsequent use.Vermiculite is fed intake in blender, then curing agent is sprinkling upon on expanded vermiculite equably, open blender, stir 3min.Open glue spraying valve, spray inorganic adhesive while stirring, after glue spraying, continue to stir 1min.
2) mould is prepared on the guide rail pre-set, load onto locator bar.At the bottom of mould, the thick ganoid plastic plate of 1mm on pad, and on plastic plate brush one deck releasing agent.Pour in mould by the material stirred, strike off by hand, surface repaves the thick plastic plate of 1mm that one deck has brushed releasing agent.
3) push in hydraulic press zone of heating by mould along guide rail, adjustment mould, in press centre, then slowly goes up booster, till making pressure reach 12MPa.After press pressure is stable, stop, remain on 145 ~ 150 DEG C of heating 2.5h under this pressure condition.
4) loose pressure machine, ejection die, will slightly press vermiculite board to carry out heating curing in press after moving back mould.The complete vermiculite board of maintenance is steadily released, and throws off plastic plate, vermiculite board is carried out sanding in time being slowly down to normal temperature, and cuts by the size of regulation.
Table 1 composite floor board and floor performance comparison
Embodiment 2
The bullet train composite floor board that the present embodiment provides is layer structure, and its intermediate layer 1 is expanded vermiculite fireproof heated board, and thickness is 12mm; The above and below in intermediate layer 1 is stainless steel wire crimped wire mesh enhancement layer 2, and thickness is 0.6mm; Enhancement layer 2 surperficial bondable fibers cement pressure plate layer 3.5, thickness is 3mm; A sticking rubber floor layer of cloth 4 of fiber cement board pressure layer 3, thickness is 2mm; Gross thickness is 22.2mm.Bullet train floor of the present utility model, integral manufacturing is shaping, and all sheet material is by organic siliconresin class adhesive compound, and cold pressing 12h under the pressure of 5MPa.The side of floor main body is provided with tenon 5, and opposite side is provided with groove 6.
The described method preparing expanded vermiculite fireproof heated board, concrete steps are as follows:
1) 20kg expanded vermiculite, 11.5kg inorganic adhesive, 0.85kg curing agent and 0.70kg waterproofing agent is taken, for subsequent use.Vermiculite is fed intake in blender, then curing agent is sprinkling upon on expanded vermiculite equably, open blender, stir 3min.Open glue spraying valve, spray inorganic adhesive while stirring, after glue spraying, continue to stir 1min.
2) mould is prepared on the guide rail pre-set, load onto locator bar.At the bottom of mould, the thick ganoid plastic plate of 1mm on pad, and on plastic plate brush one deck releasing agent.Pour in mould by the material stirred, strike off by hand, surface repaves the thick plastic plate of 1mm that one deck has brushed releasing agent.
3) push in hydraulic press zone of heating by mould along guide rail, adjustment mould, in press centre, then slowly goes up booster, till making pressure reach 12MPa.After press pressure is stable, stop, remain on 145 ~ 150 DEG C of heating 2.5h under this pressure condition.
4) loose pressure machine, ejection die, will slightly press vermiculite board to carry out heating curing in press after moving back mould.The complete vermiculite board of maintenance is steadily released, and throws off plastic plate, vermiculite board is carried out sanding in time being slowly down to normal temperature, and cuts by the size of regulation.
Table 2 composite floor board and floor performance comparison
Embodiment 3
The bullet train composite floor board that the present embodiment provides is layer structure, and its intermediate layer 1 is expanded vermiculite fireproof heated board, and thickness is 12mm; The above and below in intermediate layer 1 is stainless steel wire crimped wire mesh enhancement layer 2, and thickness is 0.6mm; Enhancement layer 2 surperficial bondable fibers cement pressure plate layer 3, thickness is 4mm; A sticking rubber floor layer of cloth 4 of fiber cement board pressure layer 3, thickness is 2mm; Gross thickness is 23.2mm.Bullet train floor of the present utility model, integral manufacturing is shaping, and all sheet material is by organic siliconresin class adhesive compound, and cold pressing 12h under the pressure of 5MPa.The side of floor main body is provided with tenon 5, and opposite side is provided with groove 6.
The described method preparing expanded vermiculite fireproof heated board, concrete steps are as follows:
1) 20kg expanded vermiculite, 12.5kg inorganic adhesive, 0.90kg curing agent and 0.70kg waterproofing agent is taken, for subsequent use.Vermiculite is fed intake in blender, then curing agent is sprinkling upon on expanded vermiculite equably, open blender, stir 3min.Open glue spraying valve, spray inorganic adhesive while stirring, after glue spraying, continue to stir 1min.
2) mould is prepared on the guide rail pre-set, load onto locator bar.At the bottom of mould, the thick ganoid plastic plate of 1mm on pad, and on plastic plate brush one deck releasing agent.Pour in mould by the material stirred, strike off by hand, surface repaves the thick plastic plate of 1mm that one deck has brushed releasing agent.
3) push in hydraulic press zone of heating by mould along guide rail, adjustment mould, in press centre, then slowly goes up booster, till making pressure reach 12MPa.After press pressure is stable, stop, to remain under this pressure condition 145 ~ 150.DEG C heating 2.5h.
4) loose pressure machine, ejection die, will slightly press vermiculite board to carry out heating curing in press after moving back mould.The complete vermiculite board of maintenance is steadily released, and throws off plastic plate, vermiculite board is carried out sanding in time being slowly down to normal temperature, and cuts by the size of regulation.
Table 3 composite floor board and floor performance comparison
Embodiment 4
The bullet train composite floor board that the present embodiment provides is layer structure, and its intermediate layer 1 is expanded vermiculite fireproof heated board, and thickness is 11mm; The above and below in intermediate layer 1 is stainless steel wire crimped wire mesh enhancement layer 2, and thickness is 0.6mm; Enhancement layer 2 surperficial bondable fibers cement pressure plate layer 3, thickness is 4mm; A sticking rubber floor layer of cloth 4 of fiber cement board pressure layer 3, thickness is 2mm; Gross thickness is 23.2mm.Bullet train floor of the present utility model, integral manufacturing is shaping, and all sheet material is by organic siliconresin class adhesive compound, and cold pressing 12h under the pressure of 5MPa.The side of floor main body is provided with tenon 5, and opposite side is provided with groove 6.
The described method preparing expanded vermiculite fireproof heated board, concrete steps are as follows:
1) 20kg expanded vermiculite, 12kg inorganic adhesive, 0.90kg curing agent and 0.75kg waterproofing agent is taken, for subsequent use.Vermiculite is fed intake in blender, then curing agent is sprinkling upon on expanded vermiculite equably, open blender, stir 3min.Open glue spraying valve, spray inorganic adhesive while stirring, after glue spraying, continue to stir 1min.
2) mould is prepared on the guide rail pre-set, load onto locator bar.At the bottom of mould, the thick ganoid plastic plate of 1mm on pad, and on plastic plate brush one deck releasing agent.Pour in mould by the material stirred, strike off by hand, surface repaves the thick plastic plate of 1mm that one deck has brushed releasing agent.
3) push in hydraulic press zone of heating by mould along guide rail, adjustment mould, in press centre, then slowly goes up booster, till making pressure reach 12MPa.After press pressure is stable, stop, remain on 145 ~ 150 DEG C of heating 2.5h under this pressure condition.
4) loose pressure machine, ejection die, will slightly press vermiculite board to carry out heating curing in press after moving back mould.The complete vermiculite board of maintenance is steadily released, and throws off plastic plate, vermiculite board is carried out sanding in time being slowly down to normal temperature, and cuts by the size of regulation.
Table 4 composite floor board and floor performance comparison
Embodiment 5
The bullet train composite floor board that the present embodiment provides is layer structure, and its intermediate layer 1 is expanded vermiculite fireproof heated board, and thickness is 12mm; The above and below in intermediate layer 1 is stainless steel wire crimped wire mesh enhancement layer 2, and thickness is 0.6mm; Enhancement layer 2 surperficial bondable fibers cement pressure plate layer 3, thickness is 3mm; A sticking rubber floor layer of cloth 4 of fiber cement board pressure layer 3, thickness is 2mm; Gross thickness is 23.2mm.Bullet train floor of the present utility model, integral manufacturing is shaping, and all sheet material is by organic siliconresin class adhesive compound, and cold pressing 12h under the pressure of 5MPa.The side of floor main body is provided with tenon 5, and opposite side is provided with groove 6.
The described method preparing expanded vermiculite fireproof heated board, concrete steps are as follows:
1) 20kg expanded vermiculite, 12.5kg inorganic adhesive, 0.80kg curing agent and 0.65kg waterproofing agent is taken, for subsequent use.Vermiculite is fed intake in blender, then curing agent is sprinkling upon on expanded vermiculite equably, open blender, stir 3min.Open glue spraying valve, spray inorganic adhesive while stirring, after glue spraying, continue to stir 1min.
2) mould is prepared on the guide rail pre-set, load onto locator bar.At the bottom of mould, the thick ganoid plastic plate of 1mm on pad, and on plastic plate brush one deck releasing agent.Pour in mould by the material stirred, strike off by hand, surface repaves the thick plastic plate of 1mm that one deck has brushed releasing agent.
3) push in hydraulic press zone of heating by mould along guide rail, adjustment mould, in press centre, then slowly goes up booster, till making pressure reach 12MPa.After press pressure is stable, stop, remain on 145 ~ 150 DEG C of heating 2.5h under this pressure condition.
4) loose pressure machine, ejection die, will slightly press vermiculite board to carry out heating curing in press after moving back mould.The complete vermiculite board of maintenance is steadily released, and throws off plastic plate, vermiculite board is carried out sanding in time being slowly down to normal temperature, and cuts by the size of regulation.
Table 5 composite floor board and floor performance comparison
The utility model Novel high-speed train composite floor board, has the advantages such as light weight, fire prevention, heat insulation, sound insulation, environmental protection.The combustibility of novel floor base material is A1 level, and flue gas toxity is AQ1 level, and illustrating at high temperature both can not burn in floor and also can not produce toxic gas, is a kind of ep-type material.The density of novel floor is little, is conducive to the speed-raising of vehicle, and air oise insulation factor is greater than 43dB, and the noise produced for vehicle and vibrations have good soundproof effect.
Above-described embodiment is only be described preferred embodiment of the present utility model; but design concept of the present utility model is not limited thereto; the unsubstantiality that those skilled in the art make the technical solution of the utility model improves, and all should fall in protection domain that the utility model claims determine.
Claims (1)
1. a bullet train floor, is characterized in that: this composite floor board is layer structure, can be divided into five layers; Intermediate layer is the structure sheaf be made up of expanded vermiculite fireproof heated board; The upper and lower faces of this structure sheaf is the enhancement layer be made up of stainless steel wire crimped wire mesh; Enhancement layer is outward fiber cement board pressure; The surface of the one deck in two-layer fiber cement board pressure is bonded with rubber floor covering cloth; Be fixedly connected with by adhesive between each composite bed; The both sides of described floor main body are arranged with tenon or groove, fixing when being convenient to floor splicing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420006205.6U CN204309331U (en) | 2014-01-03 | 2014-01-03 | A kind of bullet train floor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420006205.6U CN204309331U (en) | 2014-01-03 | 2014-01-03 | A kind of bullet train floor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204309331U true CN204309331U (en) | 2015-05-06 |
Family
ID=53131662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420006205.6U Expired - Lifetime CN204309331U (en) | 2014-01-03 | 2014-01-03 | A kind of bullet train floor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204309331U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950233A (en) * | 2014-01-03 | 2014-07-30 | 唐山轨道客车有限责任公司 | Floor for high-speed train |
-
2014
- 2014-01-03 CN CN201420006205.6U patent/CN204309331U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950233A (en) * | 2014-01-03 | 2014-07-30 | 唐山轨道客车有限责任公司 | Floor for high-speed train |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150506 |
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| CX01 | Expiry of patent term |