CN111399149A - Highway ant-proof micro cable and manufacturing method thereof - Google Patents
Highway ant-proof micro cable and manufacturing method thereof Download PDFInfo
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- CN111399149A CN111399149A CN202010357497.8A CN202010357497A CN111399149A CN 111399149 A CN111399149 A CN 111399149A CN 202010357497 A CN202010357497 A CN 202010357497A CN 111399149 A CN111399149 A CN 111399149A
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- cable
- layer
- highway
- water
- termite
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000010410 layer Substances 0.000 claims description 79
- 230000001681 protective effect Effects 0.000 claims description 30
- 239000013307 optical fiber Substances 0.000 claims description 26
- 239000004698 Polyethylene Substances 0.000 claims description 18
- 239000004677 Nylon Substances 0.000 claims description 15
- 229920001778 nylon Polymers 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 230000002787 reinforcement Effects 0.000 claims description 10
- 238000007765 extrusion coating Methods 0.000 claims description 9
- 239000006223 plastic coating Substances 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 8
- -1 polyethylene Polymers 0.000 claims description 8
- 229920000573 polyethylene Polymers 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 4
- 241000256602 Isoptera Species 0.000 claims description 3
- 238000004040 coloring Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 11
- 238000007664 blowing Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 241001465754 Metazoa Species 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 201000006082 Chickenpox Diseases 0.000 description 1
- 206010046980 Varicella Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229910021426 porous silicon Inorganic materials 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/4486—Protective covering
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
- G02B6/4432—Protective covering with fibre reinforcements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The invention provides an anti-termite micro cable for a highway, and relates to the technical field of manufacturing of the anti-termite micro cable for the highway. The technical problems of low tensile, lateral pressure resistance and ant resistance of the common GYTSO4 optical cable and the conventional blowing micro cable are solved. The ant-proof micro cable for the expressway comprises a cable core, a tearing rope, a water-blocking yarn, a reinforcing pad, a cushion layer, an inner sheath layer and an outer sheath layer. The ant-proof micro cable for the expressway can be suitable for a newly-built expressway communication pipeline system, can effectively improve the utilization rate of expressway communication pipelines, can reduce the possibility of damaging optical cables in the construction process as much as possible, reduces the fault maintenance of operators on optical cable lines, and reduces the investment cost.
Description
Technical Field
The invention relates to the technical field of manufacture of ant-proof micro cables for highways, in particular to an ant-proof micro cable for highways and a manufacture method thereof.
Background
When the communication optical cable is laid in an air blowing mode, two ends of the pipeline must be protected by special persons, and communication is kept; simultaneously, the protection personnel should make a blown optical cable reserved disc; for a common GYTS04 type optical cable, the number of cores is relatively small on the premise of meeting the requirements of the existing silicon core pipe aperture and air blowing laying, and the requirements of a network communication system of a highway cannot be met; for the conventional air-blowing micro cable, the tensile and lateral pressure resistance performance of the conventional air-blowing micro cable is difficult to cope with dragging or treading accidents possibly occurring in the construction process. When the communication optical cable is constructed by adopting a traction method, a proper arrangement hole is selected, the optical cable in general construction is longer, and the arrangement procedure is arranged from the middle to two sides; cleaning all pipelines before laying the optical cable; when laid in this manner, the tensile properties of conventional air-blown micro-cables can be affected.
In addition, the ant animals are easy to appear along the highway, and the conventional optical cable is not enough to resist the bite of the ant animals for a long time and is easy to damage.
Disclosure of Invention
The invention aims to provide an ant-proof micro cable for a highway, which improves the tensile property of an optical cable by arranging a central reinforcing piece coated with a protective cushion layer; a plurality of water-blocking yarns are arranged between the protective cushion layer and the sleeve and between the cable core and the inner sheath layer, and water seepage can be effectively avoided by adopting a flat-laying frame opposite-winding placing mode; and the ant-proof performance is enhanced by the inner sheath layer and the outer sheath layer. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an anti-termite micro cable for a highway, which comprises a plurality of sleeves arranged around a reinforcing part and an inner sheath layer wrapping a cable core, wherein the inner sheath layer is arranged on the inner sheath layer; wherein:
optionally or preferably, each of the sleeves further comprises a plurality of optical fibers and an optical fiber filler disposed between the sleeve and the optical fibers;
optionally or preferably, a tearing rope is further arranged on the inner side of the PE protective layer;
optionally or preferably, a protective cushion layer is arranged outside the reinforcing piece;
optionally or preferably, an outer sheath layer is further arranged outside the inner sheath layer;
optionally or preferably, a plurality of water blocking yarns are arranged between the protective cushion layer and the sleeve, and between the cable core and the inner sheath layer;
optionally or preferably, the cable core comprises a reinforcement formed by layer stranding with the plurality of sleeves.
Alternatively or preferably, the protective cushion layer is made of polyethylene.
Optionally or preferably, 4 water-blocking yarns are arranged between the protective cushion layer and the sleeve, wherein two water-blocking yarns are vertically placed along the reinforcing member provided with the protective cushion layer, and the other two water-blocking yarns are oppositely wound on the reinforcing member provided with the protective cushion layer.
Optionally or preferably, 4 water-blocking yarns are arranged between the cable core and the inner sheath layer, wherein two water-blocking yarns are vertically placed along the cable core, and the other two water-blocking yarns are wound on the cable core in pairs.
Alternatively or preferably, the reinforcement is made of steel wire.
Alternatively or preferably, the sleeve has an outer diameter of 1.38mm to 1.43mm and an inner diameter of 1.12mm to 1.15 mm.
Alternatively or preferably, the inner sheath layer is made of polyethylene.
Alternatively or preferably, the outer sheath layer is made of nylon.
Based on the technical scheme, the following technical effects can be generated:
the embodiment of the invention provides an anti-termite micro cable for a highway, which is suitable for a newly-built highway communication pipeline system. According to the anti-termite micro cable for the expressway, the tensile property of the optical cable is improved through the central reinforcing piece provided with the coating protection cushion layer; a plurality of water-blocking yarns are arranged between the protective cushion layer and the sleeve and between the cable core and the inner sheath layer, and the water seepage can be effectively avoided by adopting a placing mode of flat placement and opposite winding; and the ant-proof performance is enhanced by the inner sheath layer and the outer sheath layer. The ant-proof micro cable for the expressway can effectively improve the utilization rate of communication pipelines of the expressway, reduce the possibility of damaging optical cables in the construction process as much as possible, reduce the fault maintenance of operators on optical cable lines and reduce the investment cost.
The invention also provides a manufacturing method of the ant-proof micro cable for the highway, which is suitable for producing the ant-proof micro cable suitable for a newly-built highway communication pipeline system and comprises a colored optical fiber, a protective cushion layer arranged on a secondary plastic coating/steel wire reinforcing piece, an SZ twisted cable, a PE nylon double-layer extrusion coating and a finished optical cable; the method comprises the following steps:
s1 coloring the optical fiber;
s2, arranging a protective cushion layer on the secondary plastic coating/steel wire reinforcing piece, and performing plastic coating treatment on the colored optical fiber;
s3 SZ stranding and cabling, and performing cabling treatment on the optical fiber after plastic sheathing treatment by using a stranding and cabling machine;
s4 PE nylon double-layer extrusion coating, and a pull tube type extrusion die is used for extrusion coating;
s5 finishing the optical cable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a structural view of a drawtube type extrusion die of the present invention;
in the figure: 1. an optical fiber; 2. a sleeve; 3. a fiber optic filler; 4. tearing the rope; 5. a reinforcement; 6. a protective cushion layer; 7. an inner sheath layer; 8. and an outer sheath layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following.
As shown in fig. 1:
the invention provides an anti-termite micro cable for a highway, which comprises a plurality of sleeves 2 arranged around a reinforcing piece 5 and an inner sheath layer 7 wrapping a cable core; wherein:
each sleeve 2 also comprises a plurality of optical fibers 1 and optical fiber fillers 3 arranged between the sleeve 2 and the optical fibers 1;
the inner side of the PE protective layer 7 is also provided with a tearing rope 4;
a protective cushion layer 6 is arranged outside the reinforcing piece 5;
an outer sheath layer 8 is arranged outside the inner sheath layer 7;
a plurality of water-blocking yarns are arranged between the protective cushion layer 6 and the sleeve 2 and between the cable core and the inner sheath layer 7;
the cable core comprises a reinforcing part 5 formed by layer-twisting and stranding the plurality of sleeve pipes 2.
As an alternative embodiment, the protective cushion 6 is made of polyethylene.
As an optional implementation manner, 4 water-blocking yarns are arranged between the protective cushion layer 6 and the sleeve 2, two of the water-blocking yarns are vertically placed along with the reinforcement 5 provided with the protective cushion layer 6, the other two water-blocking yarns are oppositely wound on the reinforcement 5 provided with the protective cushion layer 6, and water cannot seep between the reinforcement 5 provided with the protective cushion layer 6 and the sleeve 2 according to the water-swelling performance of the water-blocking yarns and the winding manner of the two straight windings and the two windings.
As an optional implementation mode, 4 water-blocking yarns are arranged between the cable core and the inner sheath layer 7, two water-blocking yarns are placed along with the cable core, the other two water-blocking yarns are wound on the cable core in pairs, and water cannot seep between the cable core and the inner sheath layer 7 according to the water-swelling performance of the water-blocking yarns and the winding mode of the two straight windings.
As an alternative embodiment, the reinforcement 5 is made of steel wire.
As an alternative embodiment, the sleeve 2 has an outer diameter of 1.38mm to 1.43mm and an inner diameter of 1.12mm to 1.15 mm.
As an alternative embodiment, the inner sheath layer 7 is made of polyethylene.
As an alternative embodiment, the outer sheath layer 8 is made of nylon.
As an alternative embodiment, the strength member 5 uses a steel wire as a central strength member, which can improve the tensile property of the optical cable.
As an alternative embodiment, the protective covering 6 using polyethylene as reinforcement 5 can avoid direct contact between the jacket 2 and the steel wires, the diameter of which is 2.5mm to 2.6mm after coating.
As an optional embodiment, the outer diameter of the sleeve 2 is 1.4mm, and the inner diameter is 1.14mm, so that it can be ensured that the cable core does not generate a large stress on the optical fiber in the sleeve during the molding process, and thus the product quality can be ensured.
As an alternative embodiment, the inner sheath layer 7 and the outer sheath layer 8 are produced by co-extrusion of polyethylene and nylon, and the nylon layer is the outer sheath layer 8.
As an optional embodiment, the outer sheath layer 8 is made of a nylon material, the outer surface is smooth and presents concave-convex stripes, the outer sheath layer is laid in an air blowing mode during construction, and when the optical cable penetrates through a pipeline, the nylon layer is smooth and has a non-completely round structure, so that friction force can be reduced.
As an alternative embodiment, 1 blue 1100dtex polyester binding yarn is selected as the tearing rope 4, and the blue color is obviously distinguished from the yellow and purple colors of the cable core binding yarns.
The outer diameter of the optical cable has high adaptability to a porous silicon core pipe of a communication system pipeline along a newly-built highway, and can accommodate larger cores under the same outer diameter, so that the utilization rate of the pipeline is improved; the stripe type of the nylon outer sheath layer 8 not only enables the optical cable to be laid in the pipeline smoothly, but also has excellent side pressure resistance and termite resistance; the central reinforcement 5 adopts the form of steel wire and protective cushion layer 6, effectively enhances the tensile property of the optical cable, and can reduce the damage to the optical cable and protect the optical cable when the construction tail end needs to be manually dragged.
The invention also provides a manufacturing method of the ant-proof micro cable for the highway, which is suitable for producing the ant-proof micro cable suitable for a newly-built highway communication pipeline system and comprises a colored optical fiber, a protective cushion layer arranged on a secondary plastic coating/steel wire reinforcing piece, an SZ twisted cable, a PE nylon double-layer extrusion coating and a finished optical cable; the method comprises the following steps:
s1 coloring the optical fiber;
s2, arranging a protective cushion layer on the secondary plastic coating/steel wire reinforcing piece, and performing plastic coating treatment on the colored optical fiber;
s3 SZ stranding and cabling, and performing cabling treatment on the optical fiber after plastic sheathing treatment by using a stranding and cabling machine;
s4 PE nylon double-layer extrusion coating, and a pull tube type extrusion die is used for extrusion coating;
s5 finishing the optical cable.
As an optional implementation mode, when the colored optical fiber is coated into the micro-sleeve for the second time in the process flow, the fiber threading and paying-off tension of the optical fiber needs to be strictly controlled.
As an optional implementation mode, the outer diameter of the steel wire outer protection cushion layer needs to be strictly controlled, the pitch condition needs to be noticed during cabling, and the abnormal size structure is avoided when the SZ is twisted.
As an optional embodiment, when the PE and nylon double-layer extrusion molding is carried out on the cable core, a pull-tube type mold core mold sleeve is adopted, the paying-off tension and the extrusion molding condition are well controlled, and the distance between the mold core and the mold sleeve is adjusted.
As an optional implementation mode, the extrusion molding material is tightly attached to the cable core when covering the cable core, so that the optical cable is smooth in appearance, clear in concave-convex lines, free of defects of chicken pox, material falling and the like.
Claims (9)
1. The utility model provides a highway prevents ant type micro cable which characterized in that: comprises a plurality of sleeves (2) arranged around a reinforcing piece (5) and an inner sheath layer (7) wrapping a cable core; wherein:
each sleeve (2) also comprises a plurality of optical fibers (1) and optical fiber fillers (3) arranged between the sleeve (2) and the optical fibers (1);
the inner side of the PE protective layer (7) is also provided with a tearing rope (4);
a protective cushion layer (6) is arranged outside the reinforcing piece (5);
an outer sheath layer (8) is arranged outside the inner sheath layer (7);
a plurality of water-blocking yarns are arranged between the protective cushion layer (6) and the sleeve (2) and between the cable core and the inner sheath layer (7);
the cable core comprises a reinforcing piece (5) which is stranded with the plurality of sleeves (2) in a layer-stranding manner.
2. The highway termite-proof micro cable according to claim 1, wherein: the protective cushion layer (6) is made of polyethylene.
3. The highway termite-proof micro cable according to claim 2, wherein: 4 water-blocking yarns are arranged between the protective cushion layer (6) and the sleeve (2), wherein two water-blocking yarns are vertically placed along with the reinforcing piece (5) provided with the protective cushion layer (6), and the other two water-blocking yarns are oppositely wound on the reinforcing piece (5) provided with the protective cushion layer (6).
4. The highway termite resistant micro-cable according to claim 3, wherein: 4 water-blocking yarns are arranged between the cable core and the inner sheath layer (7), wherein two water-blocking yarns are vertically placed along with the cable core, and the other two water-blocking yarns are oppositely wound on the cable core.
5. The highway termite-proof micro cable according to claim 4, wherein: the reinforcing piece (5) is made of steel wires.
6. The highway termite-proof micro cable according to claim 5, wherein: the outer diameter of the sleeve (2) is 1.38mm-1.43mm, and the inner diameter is 1.12mm-1.15 mm.
7. The highway termite-proof micro cable according to claim 6, wherein: the inner sheath layer (7) is made of polyethylene.
8. The highway termite resistant micro-cable according to claim 7, wherein: the outer sheath layer (8) is made of nylon.
9. A manufacturing method of an ant-proof micro cable for a highway is characterized by comprising the following steps: the optical fiber cable comprises a colored optical fiber, a secondary plastic coating/steel wire reinforcement piece setting protection cushion layer, an SZ twisted cable, a PE nylon double-layer extrusion coating and a finished optical cable; the method comprises the following steps:
s1 coloring the optical fiber;
s2, arranging a protective cushion layer on the secondary plastic coating/steel wire reinforcing piece, and performing plastic coating treatment on the colored optical fiber;
s3 SZ stranding and cabling, and performing cabling treatment on the optical fiber after plastic sheathing treatment by using a stranding and cabling machine;
s4 PE nylon double-layer extrusion coating, and a pull tube type extrusion die is used for extrusion coating;
s5 finishing the optical cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010357497.8A CN111399149A (en) | 2020-04-29 | 2020-04-29 | Highway ant-proof micro cable and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010357497.8A CN111399149A (en) | 2020-04-29 | 2020-04-29 | Highway ant-proof micro cable and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111399149A true CN111399149A (en) | 2020-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010357497.8A Pending CN111399149A (en) | 2020-04-29 | 2020-04-29 | Highway ant-proof micro cable and manufacturing method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN111399149A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050265674A1 (en) * | 2004-05-31 | 2005-12-01 | Seung-Hyun Moon | Optical fiber cable |
| CN203260403U (en) * | 2013-05-13 | 2013-10-30 | 沈阳亨通光通信有限公司 | Termiteproof photoelectric mixing cable |
| CN106125234A (en) * | 2016-08-23 | 2016-11-16 | 江苏亨通光电股份有限公司 | A kind of large core number little cable footpath anti-ant air-blowing micro-cable and processing technology thereof |
| CN107479158A (en) * | 2017-08-30 | 2017-12-15 | 长飞光纤光缆股份有限公司 | A kind of ant proof large core number optical fibre band optical cable |
| CN110361820A (en) * | 2019-08-06 | 2019-10-22 | 江苏中天科技股份有限公司 | Air-blowing micro-cable |
| CN110794534A (en) * | 2019-11-13 | 2020-02-14 | 长光通信科技江苏有限公司 | Novel non-metal dry armored termite-proof optical cable and manufacturing method thereof |
| CN211955926U (en) * | 2020-04-29 | 2020-11-17 | 成都亨通光通信有限公司 | Highway prevents ant type micro cable |
-
2020
- 2020-04-29 CN CN202010357497.8A patent/CN111399149A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050265674A1 (en) * | 2004-05-31 | 2005-12-01 | Seung-Hyun Moon | Optical fiber cable |
| CN203260403U (en) * | 2013-05-13 | 2013-10-30 | 沈阳亨通光通信有限公司 | Termiteproof photoelectric mixing cable |
| CN106125234A (en) * | 2016-08-23 | 2016-11-16 | 江苏亨通光电股份有限公司 | A kind of large core number little cable footpath anti-ant air-blowing micro-cable and processing technology thereof |
| CN107479158A (en) * | 2017-08-30 | 2017-12-15 | 长飞光纤光缆股份有限公司 | A kind of ant proof large core number optical fibre band optical cable |
| CN110361820A (en) * | 2019-08-06 | 2019-10-22 | 江苏中天科技股份有限公司 | Air-blowing micro-cable |
| CN110794534A (en) * | 2019-11-13 | 2020-02-14 | 长光通信科技江苏有限公司 | Novel non-metal dry armored termite-proof optical cable and manufacturing method thereof |
| CN211955926U (en) * | 2020-04-29 | 2020-11-17 | 成都亨通光通信有限公司 | Highway prevents ant type micro cable |
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Application publication date: 20200710 |