CN110260061A - Height bending lightweight flexible and its production method - Google Patents
Height bending lightweight flexible and its production method Download PDFInfo
- Publication number
- CN110260061A CN110260061A CN201910497474.4A CN201910497474A CN110260061A CN 110260061 A CN110260061 A CN 110260061A CN 201910497474 A CN201910497474 A CN 201910497474A CN 110260061 A CN110260061 A CN 110260061A
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- China
- Prior art keywords
- layer
- lightweight flexible
- thickness
- steel wire
- bending
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005452 bending Methods 0.000 title claims abstract description 57
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 44
- 239000010959 steel Substances 0.000 claims abstract description 44
- 238000004804 winding Methods 0.000 claims abstract description 40
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 37
- 239000000565 sealant Substances 0.000 claims abstract description 29
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 17
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 17
- 239000004033 plastic Substances 0.000 claims abstract description 15
- 229920003023 plastic Polymers 0.000 claims abstract description 15
- 239000004744 fabric Substances 0.000 claims abstract description 14
- 229920006267 polyester film Polymers 0.000 claims abstract description 13
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 12
- 239000011248 coating agent Substances 0.000 claims description 15
- 238000000576 coating method Methods 0.000 claims description 15
- 150000001336 alkenes Chemical class 0.000 claims 1
- 210000000664 rectum Anatomy 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical compound FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/02—Hoses, i.e. flexible pipes made of fibres or threads, e.g. of textile which may or may not be impregnated, or provided with an impermeable layer, e.g. fire-hoses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
- F16L11/10—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements not embedded in the wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
- F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/24—Hoses, i.e. flexible pipes wound from strips or bands
Abstract
The invention discloses height bending lightweight flexible and its production methods, this product is followed successively by interior tube layer, sealant, anti-aging layer and outer enhancement layer from inside to outside, it is characterized by: 3 layers of the interior tube layer point of high bending lightweight flexible, innermost layer steel wire, middle layer is NN canvas, and outer layer is polytetrafluoroethylene (PTFE), and the sealant of height bending lightweight flexible is polyester film, the anti-aging layer of height bending lightweight flexible is plastic-coated fabric, and the outer enhancement layer of height bending lightweight flexible is steel wire.By wrapping machine, successively winding obtains this product from inside to outside, the steel wire that the present invention passes through innermost layer winding interval steel wire in tube layer in hose and outer enhancement layer winding interval, form double-layer spring structure, each thickness degree is very low, and two layers of steel wire of the winding that is staggered keeps each layer connection closer, thus there is very high bending ability, bending radius is less than 2 times of latus rectum, and weight is very light.
Description
Technical field
The invention belongs to pipeline fields, more particularly to high bending lightweight flexible and its production method.
Background technique
The conveyings such as China's chemical industry, oil, gas at present are mostly the hard pipeline such as steel pipeline or glass reinforced plastic pipe, this type with pipeline
Pipeline weight is big, cost is high, and connection is inconvenient, stability is poor, in order to overcome the problems, such as stereoplasm tube weight is big, price is high etc.,
Hard pipeline is replaced using hose.But the space that existing hose weight also mitigates, and the minimum bending radius of existing hose
Greater than 10 times of its latus rectum, excessive minimum bending radius increases the usage quantity of hose, extends working time, reduces and applies
Work efficiency rate, so that construction cost be made to increase.
Summary of the invention
In order to solve the problems, such as that it is insufficient that existing hose weight is big, bending radius is big, the present invention provides a kind of minimum bends
Radius is less than 2 times of latus rectum and the light and handy hose and its production method of weight.
The technical solution adopted by the present invention to solve the technical problems are as follows: height bending lightweight flexible is followed successively by from inside to outside
Interior tube layer, sealant, anti-aging layer and outer enhancement layer, it is characterised in that: 3 layers of the interior tube layer point of the high bending lightweight flexible,
Innermost layer is to be divided into 15-20mm and steel wire that diameter is 3-5mm between winding, and middle layer is the NN canvas of thickness 1-2mm, and outer layer is thickness
Spend the polytetrafluoroethylene (PTFE) of 0.1-0.3mm, the polyester film that the sealant of the high bending lightweight flexible is thickness 0.05-0.1mm, institute
State the plastic-coated fabric that the anti-aging layer of high bending lightweight flexible is thickness 0.8-1.5mm, the outer enhancing of the high bending lightweight flexible
Layer be to be divided into 15-20mm and steel wire that diameter is 3-5mm between winding, said inner tube layer, sealant, anti-aging layer and outer enhancement layer
Fixation is attached by Winding pressure.
Further, 3 layers of the interior tube layer point of the high bending lightweight flexible, innermost layer be divided between winding 16-18mm and
Diameter is the steel wire of 3.5-4.5mm, and middle layer is the NN canvas of thickness 1.2-1.8mm, and outer layer is poly- the four of thickness 0.15-0.25mm
Vinyl fluoride.
Further, the polyester film that the sealant of the high bending lightweight flexible is thickness 0.06-0.08mm.
Further, the plastic-coated fabric that the anti-aging layer of the high bending lightweight flexible is thickness 1-1.2mm.
Further, the outer enhancement layer of the high bending lightweight flexible is to be divided into 16-18mm between winding and diameter is 3.5-
The steel wire of 4.5mm.
The production method of height bending lightweight flexible, follows these steps:
(1) on the core model of wrapping machine, 15-20mm and diameter inner tube layer building: are divided into as the steel of 3-5mm between one circle winding of winding
Silk then covers the NN canvas that a layer thickness is 1-2mm, finally on the NN canvas layer covered on the steel wire floor wound
Face covers the polytetrafluoroethylene film that a layer thickness is 0.1-0.3mm again；
(2) sealant is coating: being rotated by wrapping machine, the polyester film that a layer thickness is 0.05-0.1mm is wound in interior tube layer and is made
For sealant；
(3) anti-aging layer is coating: being rotated by wrapping machine, the plastic-coated fabric that a layer thickness is 0.8-1.5mm is wound on sealant
As anti-aging layer；
(4) mark item is pasted: in anti-aging layer surface mount working environment and the mark item of related description；
(5) outer enhancement layer is coating: being rotated by wrapping machine, winds on anti-aging layer one layer and set with interior tube layer wire cut and be staggered
It is divided into 15-20mm between winding and diameter is the steel wire of 3-5mm as outer enhancement layer.
The beneficial effects of the present invention are between the steel wire and outer enhancement layer by innermost layer apart windings in tube layer in hose
Every the steel wire of winding, double-layer spring structure is formed, NN canvas layer, polytetrafluoroethylene ethylene layer between innermost layer and outer enhancement layer,
Sealant and anti-aging layer are all very thin, and two layers of steel wire of the winding that is staggered keeps each layer connection closer, therefore the present invention has very
High bending ability, bending radius is less than 2 times of latus rectum, and weight is very light.
Detailed description of the invention
Fig. 1 is the diagrammatic cross-section of high bending lightweight flexible.
Specific embodiment
Embodiment 1, below with reference to Fig. 1, the present invention is further illustrated, height bending lightweight flexible, from inside to outside successively
For interior tube layer 2, sealant 3, anti-aging layer 4 and outer enhancement layer 5, it is characterised in that: the interior tube layer of the high bending lightweight flexible
Points 3 layers, innermost layer is to be divided into 15mm between winding and steel wire 21 that diameter is 3mm, and middle layer is this reality of the NN canvas 22(of thickness 1mm
Apply example and select Qingzhou in Shandong province's textile company product), polytetrafluoroethylene (PTFE) 23(the present embodiment that outer layer is thickness 0.1mm selects Zhejiang
Deqing Ke Sai Plastic Products Co., Ltd product), the polyester film that the sealant of the high bending lightweight flexible is thickness 0.05mm
(the present embodiment selects Dongguang County Bao Yun plastic package material Co., Ltd product), the anti-aging layer of the high bending lightweight flexible
For the plastic-coated fabric (the present embodiment selects the town Gucheng County Qing Han canvas factory product) of thickness 0.8mm, the height is bent lightweight flexible
Outer enhancement layer is to be divided into 15mm and steel wire that diameter is 3mm between winding, and each layer is fixedly connected on one by wrapping machine Winding pressure
It rises, and it is closer by the steel wire for the outer enhancement layer being staggered with interior tube layer steel wire to connect each layer.
The production method of height bending lightweight flexible, follows these steps:
(1) inner tube layer building: on the core model 1 of wrapping machine, the steel wire that one circle of winding is divided into 15mm between winding and diameter is 3mm,
Then the NN canvas that a layer thickness is 1mm is covered on the steel wire floor wound, on the NN canvas layer covered again finally
Cover the polytetrafluoroethylene film that a layer thickness is 0.1mm；
(2) sealant is coating: being rotated by wrapping machine, it is the polyester film of 0.05mm as close that a layer thickness is wound in interior tube layer
Sealing；
(3) anti-aging layer is coating: being rotated by wrapping machine, the plastic-coated fabric conduct that a layer thickness is 0.8mm is wound on sealant
Anti-aging layer；
(4) mark item is pasted: in anti-aging layer surface mount working environment, the mark of the production related contents such as company and telephone number
Item；
(5) outer enhancement layer is coating: being rotated by wrapping machine, winds on anti-aging layer one layer and set with interior tube layer wire cut and be staggered
It is divided into 15mm between winding and diameter is the steel wire of 3mm as outer enhancement layer.
Embodiment 2, below with reference to Fig. 1, the present invention is further illustrated, height bending lightweight flexible, from inside to outside successively
For interior tube layer 2, sealant 3, anti-aging layer 4 and outer enhancement layer 5, it is characterised in that: the interior tube layer of the high bending lightweight flexible
Points 3 layers, innermost layer is to be divided into 17.5mm between winding and steel wire 21 that diameter is 4mm, and middle layer is the NN canvas 22 of thickness 1.5mm,
Outer layer is the polytetrafluoroethylene (PTFE) 23 of thickness 0.2mm, the polyester film that the sealant of the high bending lightweight flexible is thickness 0.75mm,
The plastic-coated fabric that the anti-aging layer of the high bending lightweight flexible is thickness 1.15mm, the outer enhancement layer of the high bending lightweight flexible
17.5mm is divided into and steel wire that diameter is 4mm between winding, and each layer is fixed together by wrapping machine Winding pressure, and is led to
Crossing the steel wire of the outer enhancement layer being staggered with interior tube layer steel wire, to connect each layer closer.
The production method of height bending lightweight flexible, follows these steps:
(1) on the core model 1 of wrapping machine, 17.5mm and diameter inner tube layer building: are divided into as the steel of 4mm between one circle winding of winding
Silk then covers the NN canvas that a layer thickness is 1.5mm, finally on the NN canvas layer covered on the steel wire floor wound
Face covers the polytetrafluoroethylene film that a layer thickness is 0.2mm again；
(2) sealant is coating: being rotated by wrapping machine, it is the polyester film of 0.75mm as close that a layer thickness is wound in interior tube layer
Sealing；
(3) anti-aging layer is coating: being rotated by wrapping machine, the plastic-coated fabric conduct that a layer thickness is 1.15mm is wound on sealant
Anti-aging layer；
(4) mark item is pasted: in anti-aging layer surface mount working environment, the mark of the production related contents such as company and telephone number
Item；
(5) outer enhancement layer is coating: being rotated by wrapping machine, winds on anti-aging layer one layer and set with interior tube layer wire cut and be staggered
It is divided into 17.5mm between winding and diameter is the steel wire of 4mm as outer enhancement layer.
Embodiment 3, below with reference to Fig. 1, the present invention is further illustrated, height bending lightweight flexible, from inside to outside successively
For interior tube layer 2, sealant 3, anti-aging layer 4 and outer enhancement layer 5, it is characterised in that: the interior tube layer of the high bending lightweight flexible
Points 3 layers, innermost layer is to be divided into 20mm between winding and steel wire 21 that diameter is 5mm, and middle layer is the NN canvas 22 of thickness 2mm, outer layer
For the polytetrafluoroethylene (PTFE) 23 of thickness 0.3mm, the polyester film that the sealant of the high bending lightweight flexible is thickness 0.1mm is described
The outer enhancement layer of the plastic-coated fabric that the anti-aging layer of height bending lightweight flexible is thickness 1.5mm, the high bending lightweight flexible is to twine
Around the steel wire for being divided into 20mm and diameter is 5mm, each layer is fixed together by wrapping machine Winding pressure, and by with it is interior
The steel wire for the outer enhancement layer that tube layer steel wire is staggered keeps each layer connection closer.
The production method of height bending lightweight flexible, follows these steps:
(1) inner tube layer building: on the core model 1 of wrapping machine, the steel wire that one circle of winding is divided into 20mm between winding and diameter is 5mm,
Then the NN canvas that a layer thickness is 2mm is covered on the steel wire floor wound, on the NN canvas layer covered again finally
Cover the polytetrafluoroethylene film that a layer thickness is 0.3mm；
(2) sealant is coating: being rotated by wrapping machine, it is the polyester film of 0.1mm as close that a layer thickness is wound in interior tube layer
Sealing；
(3) anti-aging layer is coating: being rotated by wrapping machine, the plastic-coated fabric conduct that a layer thickness is 1.5mm is wound on sealant
Anti-aging layer；
(4) mark item is pasted: in anti-aging layer surface mount working environment, the mark of the production related contents such as company and telephone number
Item；
(5) outer enhancement layer is coating: being rotated by wrapping machine, winds on anti-aging layer one layer and set with interior tube layer wire cut and be staggered
It is divided into 20mm between winding and diameter is the steel wire of 5mm as outer enhancement layer.
Claims (6)
1. height bending lightweight flexible, is followed successively by interior tube layer (2), sealant (3), anti-aging layer (4) and outer enhancement layer from inside to outside
(5), it is characterised in that: 3 layers of the interior tube layer point of the high bending lightweight flexible, innermost layer are that 15-20mm and straight is divided between winding
Diameter is the steel wire (21) of 3-5mm, and middle layer is the NN canvas (22) of thickness 1-2mm, and outer layer is the polytetrafluoroethyl-ne of thickness 0.1-0.3mm
Alkene (23), the polyester film that the sealant of the high bending lightweight flexible is thickness 0.05-0.1mm, the high bending lightweight flexible
Anti-aging layer be thickness 0.8-1.5mm plastic-coated fabric, the outer enhancement layer of the high bending lightweight flexible is to be divided into 15- between winding
The steel wire that 20mm and diameter are 3-5mm, said inner tube layer, sealant, anti-aging layer and outer enhancement layer are carried out by Winding pressure
It is connected and fixed.
2. high bending lightweight flexible according to claim 1, it is characterised in that: the interior tube layer point 3 of height bending lightweight flexible
Layer, innermost layer are to be divided into 16-18mm and steel wire that diameter is 3.5-4.5mm between winding, and middle layer is the NN sail of thickness 1.2-1.8mm
Cloth, outer layer are the polytetrafluoroethylene (PTFE) of thickness 0.15-0.25mm.
3. high bending lightweight flexible according to claim 1, it is characterised in that: the sealant of height bending lightweight flexible is thickness
Spend the polyester film of 0.06-0.08mm.
4. high bending lightweight flexible according to claim 1, it is characterised in that: the anti-aging layer of height bending lightweight flexible is
The plastic-coated fabric of thickness 1-1.2mm.
5. high bending lightweight flexible according to claim 1, it is characterised in that: the outer enhancement layer of height bending lightweight flexible is
16-18mm and diameter are divided between winding as the steel wire of 3.5-4.5mm.
6. the production method of height bending lightweight flexible, follows these steps:
(1) inner tube layer building: on the core model (1) of wrapping machine, 15-20mm is divided between one circle winding of winding and diameter is 3-5mm
Steel wire, then on the steel wire floor wound cover a layer thickness be 1-2mm NN canvas, finally in the NN canvas covered
Layer covers the polytetrafluoroethylene film that a layer thickness is 0.1-0.3mm again above；
(2) sealant is coating: being rotated by wrapping machine, the polyester film that a layer thickness is 0.05-0.1mm is wound in interior tube layer and is made
For sealant；
(3) anti-aging layer is coating: being rotated by wrapping machine, the plastic-coated fabric that a layer thickness is 0.8-1.5mm is wound on sealant
As anti-aging layer；
(4) mark item is pasted: in anti-aging layer surface mount working environment and the mark item of related description；
(5) outer enhancement layer is coating: being rotated by wrapping machine, winds on anti-aging layer one layer and set with interior tube layer wire cut and be staggered
It is divided into 15-20mm between winding and diameter is the steel wire of 3-5mm as outer enhancement layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910497474.4A CN110260061B (en) | 2019-06-10 | 2019-06-10 | High-bending light hose and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910497474.4A CN110260061B (en) | 2019-06-10 | 2019-06-10 | High-bending light hose and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110260061A true CN110260061A (en) | 2019-09-20 |
| CN110260061B CN110260061B (en) | 2024-02-02 |
Family
ID=67917388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910497474.4A Active CN110260061B (en) | 2019-06-10 | 2019-06-10 | High-bending light hose and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110260061B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113942256A (en) * | 2020-07-15 | 2022-01-18 | 中国石油化工股份有限公司 | Method for preparing oil pipe lining |
| CN117781049A (en) * | 2024-02-27 | 2024-03-29 | 厦门市卓励石化设备有限公司 | Composite hose suitable for low-temperature medium conveying and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5182147A (en) * | 1988-10-14 | 1993-01-26 | Dantec Ltd. | Composite hose |
| CN2307168Y (en) * | 1997-10-10 | 1999-02-10 | 王利先 | Leather wire hose |
| CN2446361Y (en) * | 2000-09-19 | 2001-09-05 | 左湘宁 | Compound hose with steel skeleton |
| US20100062202A1 (en) * | 2007-03-16 | 2010-03-11 | Nkt Flexibles I/S | Flexible pipe |
| CN208295333U (en) * | 2018-04-11 | 2018-12-28 | 永春县优科科技有限公司 | High tensile flexible pipe structure is exploited with offshore oil |
| CN210739602U (en) * | 2019-06-10 | 2020-06-12 | 四川景华石油机械有限公司 | High-bending light hose |
-
2019
- 2019-06-10 CN CN201910497474.4A patent/CN110260061B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5182147A (en) * | 1988-10-14 | 1993-01-26 | Dantec Ltd. | Composite hose |
| CN2307168Y (en) * | 1997-10-10 | 1999-02-10 | 王利先 | Leather wire hose |
| CN2446361Y (en) * | 2000-09-19 | 2001-09-05 | 左湘宁 | Compound hose with steel skeleton |
| US20100062202A1 (en) * | 2007-03-16 | 2010-03-11 | Nkt Flexibles I/S | Flexible pipe |
| CN208295333U (en) * | 2018-04-11 | 2018-12-28 | 永春县优科科技有限公司 | High tensile flexible pipe structure is exploited with offshore oil |
| CN210739602U (en) * | 2019-06-10 | 2020-06-12 | 四川景华石油机械有限公司 | High-bending light hose |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113942256A (en) * | 2020-07-15 | 2022-01-18 | 中国石油化工股份有限公司 | Method for preparing oil pipe lining |
| CN117781049A (en) * | 2024-02-27 | 2024-03-29 | 厦门市卓励石化设备有限公司 | Composite hose suitable for low-temperature medium conveying and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110260061B (en) | 2024-02-02 |
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