CN112411274A - Utilization method of waste high-pressure hose and damping base plate prepared by method - Google Patents
Utilization method of waste high-pressure hose and damping base plate prepared by method Download PDFInfo
- Publication number
- CN112411274A CN112411274A CN202011366212.3A CN202011366212A CN112411274A CN 112411274 A CN112411274 A CN 112411274A CN 202011366212 A CN202011366212 A CN 202011366212A CN 112411274 A CN112411274 A CN 112411274A
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- Prior art keywords
- steel wire
- pressure steel
- waste
- hoses
- tire
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
- E01B19/003—Means for reducing the development or propagation of noise
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
- E01B9/681—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by the material
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
- E01B9/685—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a utilization method of waste high-pressure steel wire hoses and a high-speed railway bed shock absorption base plate prepared by the method, wherein steel wires or steel wire ropes penetrate through the high-pressure steel wire hoses which are arranged at equal intervals to form a curtain-shaped flexible plate; filling waste tire particles and/or waste tire strips in the waste high-pressure steel wire hose; tire particles or tire strips are sprayed and adhered between the outer surfaces of the waste high-pressure steel wire hoses to form the high-speed railway bed shock absorption base plate, so that the upper surface is a plane, and the lower surface is either a plane or a concave-convex surface. The invention not only solves the problem of environmental pollution caused by low utilization rate of waste high-pressure hoses, but also provides the high-speed railway bed damping cushion plate with good damping effect and strong stability.
Description
Technical Field
The invention relates to the technical field of environmental protection and high-speed rail, in particular to a shock-absorbing base plate for a high-speed railway bed by utilizing waste high-pressure hoses.
Background
With the rapid development of the infrastructure technology and social economy in China, the living standard of people is continuously improved, and the requirements on the speed, comfort and safety of high-speed rail locomotives during traveling are also continuously improved. The running speed of the train is continuously improved, and meanwhile, the vibration generated during running is increased, so that the comfort and safety experience of people on the high-speed rail locomotive are seriously influenced.
At present, a shock absorption base plate is generally adopted between a track bed and a sleeper rail of a high-speed rail to absorb shock generated when a train runs on a rail, and the performance of the base plate directly influences the running safety and comfort of the train. The common high-speed rail damping base plate is manufactured by a rubber plate with a long-strip dent, and the damping effect is achieved by the rubber base plate only depending on the material property of the rubber base plate, so that the base plate body has the phenomena of large deformation, easy aging and abrasion and the like after long-term use, and the damping effect is seriously reduced; the combined shock absorption base plate is bonded together only by the viscosity of glue, so that the connection between the adjacent shock absorption base plates has certain instability under the high-speed vibration of a locomotive.
While the waste high pressure hose is generally separated from the steel wire. And (5) recycling the steel wire. The rubber is crushed into fine particles and used as a filler of the leakage-proof agent, and the utilization value is very low.
Disclosure of Invention
The present invention aims to overcome the disadvantages of the prior art. How to combine the high pressure resistance of high pressure hose with the shock attenuation performance of high-speed railway shock attenuation backing plate is the technical problem that needs to solve. The invention provides a utilization method of waste high-pressure hoses and a damping base plate prepared by the method, so as to improve the damping effect and stability of the damping base plate.
In order to achieve the purpose, the invention provides the following technical scheme: a utilization method of waste high-pressure steel wire hoses comprises the following steps:
1) collecting waste high-pressure steel wire hoses with the diameters of 10 mm-30 mm, wherein the diameter of the waste high-pressure steel wire hose is preferably 15 mm-20 mm;
2) cleaning the waste high-pressure steel wire hoses, and cleaning the inside and the outside;
3) and manufacturing the waste high-pressure steel wire hose into a flexible plate.
And 3, manufacturing the waste high-pressure steel wire hoses into flexible plates, cutting the waste high-pressure steel wire hoses into required equidistant lengths, and then transversely and serially connecting the high-pressure steel wire hoses with steel wires to form the curtain-shaped flexible plates.
The steel wires of the curtain-shaped flexible plates are tensioned, so that the waste hose forms a flat sheet.
And the waste high-pressure steel wire hose is internally sprayed, adhered and filled with waste tire particles and/or waste tire strips.
Tire particles or tire strips are sprayed and adhered between the outer surfaces of the high-pressure tubes, so that the upper surfaces are flat, and the lower surfaces are either flat or concave-convex.
And 3, preparing the waste high-pressure steel wire hose into a flexible plate, namely cutting the high-pressure steel wire hose into rings with the width of 3-7 mm, and spraying and adhering the rings to form the flexible plate.
The spray bonding is a flexible plate, and the material of the flexible plate comprises 1/3 waste high-pressure steel wire hose circular rings, 1/3 tire granules and 1/3 tire strips.
A high-speed railway bed shock absorption backing plate prepared from waste high-pressure steel wire hoses is characterized by comprising the high-pressure steel wire hoses which are arranged at equal intervals, wherein steel wires or steel wire ropes penetrate through the high-pressure steel wire hoses to connect the waste high-pressure steel wire hoses in series to form a curtain-shaped flexible plate.
And the waste high-pressure steel wire hose is internally sprayed, adhered and filled with waste tire particles and/or waste tire strips.
Tire particles or tire strips are sprayed and adhered between the outer surfaces of the waste high-pressure steel wire hoses, so that the upper surface is a plane, and the lower surface is either a plane or a convex-concave surface.
The invention provides a method for effectively utilizing waste high-pressure hoses and a high-speed railway bed shock absorption base plate prepared by the method. The high-pressure steel wire hose is formed by ingeniously utilizing the elastic design of the high-pressure steel wire hose and the tire rubber through steel wires, and waste tire particles and/or waste tire strips are filled in the high-pressure steel wire hose, so that the high-pressure steel wire hose is like a tubular bag body. The wall of the capsule body contains the steel wire, so that the capsule body can bear pressure far higher than that of common rubber, and the compression strength is far higher than the compression strength which can be achieved by the rubber. And the shock absorption base plate added with the waste high-pressure hose is firmer and firmer, and has longer service life. Therefore, the invention not only solves the problem of environmental pollution caused by low utilization rate of waste high-pressure hoses, but also provides the high-speed railway bed damping cushion plate with good damping effect and strong stability.
Drawings
Figure 1 is a schematic view of the application of a first high speed railway bed cushion.
Figure 2 is a schematic view of the application of a second high speed railway bed cushion.
Figure 3 is a schematic bottom view of a second type of high speed railway bed dunnage.
Figure 4 is a schematic view of a curtain-like flexible sheet with equidistant high pressure wire hoses.
FIG. 5 is a schematic view of a cord-like flexible sheet filled with tire particles or tire strips.
FIG. 6 is a schematic cross-sectional view of a cord-like flexible sheet filled with tire particles or tire strips.
Figure 7 is a schematic view of a curtain-like flexible sheet with equidistant high pressure hose flats.
1. A steel rail; 2. crossties; 3. a ballast bed; 4. a water discharge tank; 5. a shock-absorbing base plate; 6. a backing plate plane layer; 7. a protrusion; 11. A curtain-like flexible sheet; 12. equidistant high-pressure steel wire hoses; 13. a steel wire or wire rope; 14. equidistant high-pressure steel wire hose flat sheets; 15. tire particles or tire strips.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is obvious that the described embodiments are only a part of the implementations of the present invention, and not all implementations, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without any inventive work are within the scope of the present invention.
As shown in fig. 1 and 2, the high-speed railway bed shock absorbing pad 5 according to the present embodiment is located above the high-speed railway bed 3 and below the crossties 2. The thickness range of the shock absorption base plate 5 is 10 mm-35 mm. The shock absorption base plate 5 is prepared from the following components: high pressure wire hoses, tire pellets, and tire strips.
The preparation method of the shock absorbing pad 5 of the high-speed railway bed comprises the following steps:
(1) and collecting the high-pressure steel wire hose. The diameter of the high-pressure steel wire hose is 10 mm-30 mm. The high-pressure steel wire hose is a waste high-pressure steel wire hose. The waste high-pressure steel wire hose comprises a winding hose and a weaving hose. Preferably, the diameter of the waste high-pressure steel wire hose is 15 mm-20 mm.
(2) And (2) cleaning the waste high-pressure steel wire hose obtained in the step (1). And the inner pipe of the waste high-pressure steel wire hose is fully washed clean by using high-pressure cleaning liquid and cleaning balls. And cleaning the outer pipe of the waste high-pressure steel wire hose by using a brush.
(3) And (3) manufacturing the waste high-pressure steel wire hose obtained in the step (2) into a flexible plate. And cutting the waste high-pressure steel wire hoses at equal intervals according to the length of 200 mm-2000 mm. As shown in fig. 4, 5 and 6, the cut equidistant waste high-pressure steel hoses 12 are transversely arranged, and steel wires or steel wire ropes 13 are sequentially and transversely connected in series with the equidistant waste high-pressure steel hoses 12 to form a curtain-shaped flexible plate 11.
The inner tubes of equidistant high pressure steel hoses 12 of said curtain-like flexible sheet 11 are filled with tyre particles and/or tyre strips 15. The tire particles and/or tire strips 15 are sprayed and adhered into the tubes of the equidistant high-pressure steel wire hoses 12 by using a high-pressure gun, and the inner spaces of the equidistant high-pressure steel wire hoses 12 are filled.
Optionally, the inner tube of the cut equidistant waste high-pressure steel wire hose 12 is filled with tire particles and/or tire strips 15. And the waste tire particles and/or the waste tire strips 15 are sprayed and stuck into the pipe of the equidistant high-pressure steel wire hose 12 by using a high-pressure gun, and the space in the pipe of the equidistant high-pressure steel wire hose 12 is filled. Then, the equidistant waste high-pressure steel wire hoses 12 filled with the tire particles and/or the tire strips 15 are transversely arranged and are sequentially and transversely connected in series by steel wires or steel wire ropes 13 to form the curtain-shaped flexible plate 11.
Alternatively, as shown in fig. 7, the steel wires or steel cables 13 of the curtain-like flexible board 11 are tensioned, so that the equidistant high-pressure steel hoses 12 of the curtain-like flexible board 11 become equidistant high-pressure steel hose flat pieces 14. The inner walls of the equidistant high-pressure steel wire hose flat sheets 14 are tightly attached together, and no gap exists in the pipe.
The curtain-like flexible plate 11 constitutes the main body of the pad plane layer 6 of the cushion pad 5.
Tire particles and/or tire strips 15 are sprayed and adhered between the outer surfaces of the curtain-like flexible sheets 11 to obtain the cushion pad 5. The waste tire particles and/or the waste tire strips 15 are sprayed and adhered to the outer surface of the curtain-shaped flexible plate 11 by using PU glue. Preferably, the waste tire particles and/or the waste tire strips 15 are sprayed and adhered to the upper surface and the lower surface of the spray curtain-shaped flexible plate 11 to be flat by using PU glue. Further preferably, the waste tire particles and/or the waste tire strips 15 are sprayed and adhered with PU glue on the upper surface of the curtain-shaped flexible plate 11 to form a plane, and the lower surface of the curtain-shaped flexible plate is sprayed and adhered to form a convex-concave surface.
Optionally, the waste high-pressure steel wire hoses are cut into equidistant high-pressure steel wire hose rings with the widths of 3mm-7 mm. Mixing the equidistant high-pressure steel wire hose ring, the tire particles and the tire strips, and spraying and adhering the mixture into a flexible plate by using PU glue. And spraying and adhering tire particles and/or tire strips between the outer surfaces of the flexible plates to obtain the shock absorption base plate 5. Optionally, the equidistant high-pressure steel wire hose ring, the tire particles and the tire strips are mixed, and PU glue is sprayed and adhered to form the shock absorption base plate 5. The material of the flexible board comprises 1/3 waste high-pressure steel wire hose, 1/3 tire particles and 1/3 tire strips.
The action of cutting the waste high-pressure steel wire hoses into equidistant high-pressure steel wire hose rings with the widths of 3mm-7mm can be carried out in any one of the steps (1), (2) or (3).
The tire particles and tire strips 15 are made of waste tires. Preferably, the tire particles and the tire strips 15 are made of tread rubber of waste tires. The side length of the tire strip is 1.2 +/-0.3 mm. The section shape of the tire strip in the length direction is a polygon such as a rectangle, a square, a triangle, a parallelogram, a trapezoid, a circle and the like.
In the present embodiment, the surface of the high-speed railway bed shock absorbing pad 5 in contact with the sleeper 2 is the upper surface of the shock absorbing pad 5, and the surface in contact with the high-speed railway bed 3 is the lower surface of the shock absorbing pad 5.
As shown in fig. 1, the upper and lower surfaces of the cushion plate 5 are flat.
Preferably, as shown in fig. 2 and 3, the shock absorbing pad 5 has a flat upper surface and a convex-concave lower surface. The cushion pad 5 includes a pad plane layer 6 and protrusions 7. The convex and concave surfaces of the embodiment are provided with the bulges 7. The projections 7 are located between the tie-plate plane layer 6 and the track bed 3, are staggered in the vertical projection direction and extend through the entire plane layer 6. The contact surface of the bulge 7 and the plane layer 6 is circular, the diameter is 30 mm-40 mm, and the height is 15 mm-20 mm.
The shock pad that this embodiment provided forms through the elastic design of steel wire ingenious high pressure steel wire hose and tire rubber that utilizes, and inside junked tire granule and/or junked tire strip of filling of high pressure steel wire hose for high pressure steel wire hose is like pipy utricule. The wall of the capsule body contains the steel wire, so that the capsule body can bear pressure far higher than that of common rubber, and the compression strength is far higher than the compression strength which can be achieved by the rubber. And the shock absorption base plate added with the waste high-pressure hose is firmer and firmer, and has longer service life. The concave-convex surface design of the shock attenuation backing plate lower surface that this embodiment provided further weakens the rigid contact of ballast bed and sleeper, and fixed shock attenuation backing plate reduces and removes to realize improving the purpose of shock attenuation effect and increase backing plate stability.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.
Claims (10)
1. A utilization method of waste high-pressure steel wire hoses comprises the following steps:
1) collecting waste high-pressure steel wire hoses with the diameters of 10 mm-30 mm, preferably, the diameters of the waste high-pressure steel wire hoses are 15 mm-20 mm;
2) cleaning the waste high-pressure steel wire hoses, and cleaning the inside and the outside;
3) and manufacturing the waste high-pressure steel wire hose into a flexible plate.
2. The method for utilizing waste high-pressure steel wire hoses according to claim 1, wherein the step 3 is to make the waste high-pressure steel wire hoses into flexible sheets, to cut the waste high-pressure steel wire hoses into required equidistant lengths, and then to connect the high-pressure steel wire hoses transversely in series by steel wires to form the curtain-shaped flexible sheets.
3. The method for utilizing waste high pressure steel wire hose according to claim 2, wherein the steel wires of said curtain-like flexible plate are tightened to form the waste hose into a flat piece.
4. The method of utilizing waste high pressure steel wire hoses according to claim 2, wherein the waste high pressure steel wire hoses are internally sprayed with the waste tire particles and/or the waste tire strips.
5. The method for utilizing waste high-pressure steel wire hoses according to claim 2, wherein the tire particles or tire strips are sprayed and adhered between the outer surfaces of the high-pressure pipes, so that the upper surface is a plane, and the lower surface is either a plane or a concave-convex surface.
6. The utilization method of the waste high-pressure steel wire hoses according to claim 1, characterized in that the step 3 is to make the waste high-pressure steel wire hoses into flexible plates, cut the high-pressure steel wire hoses into rings with the width of 3mm-7mm, and then spray-bond the rings into the flexible plates.
7. The method of utilizing old and useless high pressure steel wire hose according to claim 6, characterized by that the said spray-bonded is the flexible board, mean the material of the flexible board includes 1/3 old and useless high pressure steel wire hose ring, 1/3 tire granule, 1/3 tire strip.
8. A high-speed railway bed shock absorption backing plate prepared from waste high-pressure steel wire hoses is characterized by comprising the high-pressure steel wire hoses which are arranged at equal intervals, wherein steel wires or steel wire ropes penetrate through the high-pressure steel wire hoses to connect the waste high-pressure steel wire hoses in series to form a curtain-shaped flexible plate.
9. A high speed railway bed shock absorbing mat as claimed in claim 8, wherein said old and useless high pressure steel wire hose is filled with old and useless tire particles and/or old and useless tire strips.
10. A high speed railway track shock absorbing mat as claimed in claim 9, wherein the tyre particles or strips are sprayed between the outer surfaces of said waste high pressure steel wire hoses, so that the upper surface is a flat surface and the lower surface is either a flat surface or a concave-convex surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011366212.3A CN112411274B (en) | 2020-11-29 | 2020-11-29 | Utilization method of waste high-pressure hose and damping base plate prepared by method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011366212.3A CN112411274B (en) | 2020-11-29 | 2020-11-29 | Utilization method of waste high-pressure hose and damping base plate prepared by method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112411274A true CN112411274A (en) | 2021-02-26 |
| CN112411274B CN112411274B (en) | 2022-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011366212.3A Active CN112411274B (en) | 2020-11-29 | 2020-11-29 | Utilization method of waste high-pressure hose and damping base plate prepared by method |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4013357A1 (en) * | 1990-04-26 | 1991-10-31 | Christian A Schlimme | Noise and creep redn. underlay for tray tracks - old tyres are converted into plates which reduce maintenance cost and uneven road surfaces |
| DE4242359A1 (en) * | 1992-12-15 | 1994-06-16 | Arnold Zurell | Cut scrap tyre profiles - used as acoustic insulation, seals and reinforcements |
| CN1140636A (en) * | 1995-07-14 | 1997-01-22 | 杨家华 | Method for producing engine foot-pad and other rubber product with waste tyre |
| JP2003013402A (en) * | 2001-07-04 | 2003-01-15 | Aren:Kk | Pad and construction method for elasticizing track |
| JP2005024032A (en) * | 2003-07-04 | 2005-01-27 | Bridgestone Corp | High pressure hose |
| CN101135132A (en) * | 2007-09-24 | 2008-03-05 | 青岛科而泰环境控制技术有限公司 | Elastic bearing plate |
| CN109093882A (en) * | 2018-06-27 | 2018-12-28 | 桐乡市军成橡塑有限公司 | A kind of sound insulation resilient cushion and preparation method thereof |
| CN110241674A (en) * | 2019-04-11 | 2019-09-17 | 上海置泥环保设备制造有限公司 | It is a kind of to utilize steel plate structure made of the waste and old steel pipe in building site |
| CN110485532A (en) * | 2019-08-22 | 2019-11-22 | 浙江工业大学 | A kind of urban discharging pipeline structure and construction method based on waste tire |
-
2020
- 2020-11-29 CN CN202011366212.3A patent/CN112411274B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4013357A1 (en) * | 1990-04-26 | 1991-10-31 | Christian A Schlimme | Noise and creep redn. underlay for tray tracks - old tyres are converted into plates which reduce maintenance cost and uneven road surfaces |
| DE4242359A1 (en) * | 1992-12-15 | 1994-06-16 | Arnold Zurell | Cut scrap tyre profiles - used as acoustic insulation, seals and reinforcements |
| CN1140636A (en) * | 1995-07-14 | 1997-01-22 | 杨家华 | Method for producing engine foot-pad and other rubber product with waste tyre |
| JP2003013402A (en) * | 2001-07-04 | 2003-01-15 | Aren:Kk | Pad and construction method for elasticizing track |
| JP2005024032A (en) * | 2003-07-04 | 2005-01-27 | Bridgestone Corp | High pressure hose |
| CN101135132A (en) * | 2007-09-24 | 2008-03-05 | 青岛科而泰环境控制技术有限公司 | Elastic bearing plate |
| CN109093882A (en) * | 2018-06-27 | 2018-12-28 | 桐乡市军成橡塑有限公司 | A kind of sound insulation resilient cushion and preparation method thereof |
| CN110241674A (en) * | 2019-04-11 | 2019-09-17 | 上海置泥环保设备制造有限公司 | It is a kind of to utilize steel plate structure made of the waste and old steel pipe in building site |
| CN110485532A (en) * | 2019-08-22 | 2019-11-22 | 浙江工业大学 | A kind of urban discharging pipeline structure and construction method based on waste tire |
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| Publication number | Publication date |
|---|---|
| CN112411274B (en) | 2022-08-23 |
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Effective date of registration: 20221124 Address after: 456,592 East Section of South Ring Road, Yaocun Town, Linzhou City, Anyang City, Henan Province Patentee after: LINZHOU PUBLIC SERVICE RAILWAY EQUIPMENT MANUFACTURING Co.,Ltd. Address before: 456550 room 304, building A1, 863 science and Technology Industrial Park, Hongqi Canal Avenue, Linzhou, Anyang, Henan. Patentee before: LINZHOU XINXIN MATERIAL TECHNOLOGY Co.,Ltd. |
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