CN115755293A - Ultra-large core number ribbon optical cable and manufacturing method thereof - Google Patents
Ultra-large core number ribbon optical cable and manufacturing method thereof Download PDFInfo
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- CN115755293A CN115755293A CN202211196301.7A CN202211196301A CN115755293A CN 115755293 A CN115755293 A CN 115755293A CN 202211196301 A CN202211196301 A CN 202211196301A CN 115755293 A CN115755293 A CN 115755293A
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Abstract
The invention relates to a ribbon optical cable with an ultra-large core number and a manufacturing method thereof, wherein the ribbon optical cable comprises an optical fiber ribbon, a TPU (thermoplastic polyurethane) ribbon, a tearing rope, a reinforcement, a water blocking tape, an outer sheath and water blocking powder from inside to outside; the manufacturing method comprises the steps of enabling the optical fiber ribbon to pass through a powder coating machine, adding water-blocking powder on the optical fiber ribbon, then adding the TPU tape around the optical fiber ribbon through a plastic extruding machine, adding a water-blocking powder filling device at the machine head of the plastic extruding machine, enabling the water-blocking powder to be coated on the TPU tape to form subunits, twisting the subunits together, longitudinally wrapping the water-blocking tape, and extruding a sheath embedded with a reinforcing piece to finally form the ribbon optical cable. The optical cable has the beneficial effects that the number of optical cable cores is large, and the TPU belt can be quickly peeled off by fingers, so that the construction efficiency is improved; the outer sheath adopts a convex shape, so that the position of the reinforcing part can be quickly identified, and the longitudinal stripping or skylight opening is convenient and quick.
Description
Technical Field
The invention relates to the technical field of optical cables, in particular to a super-large core number ribbon optical cable and a manufacturing method thereof.
Background
With the rapid development of communication services such as fiber-to-the-home, large-client access, data center construction and the like, people have increasing information demand and increasing demand for optical fibers, and in addition to the increasing scarcity of urban pipeline resources, optical cables are continuously developed towards the direction of large core number, and even have the demand of 3456-core optical cables abroad. However, the ribbon cables currently on the market have the following disadvantages:
1. the outer sheath of the general ribbon optical cable with large core number is a central beam tube type, a layer stranded optical cable, a skeleton type optical cable and the like, the outer diameter of the optical cable is large, the density of the optical fiber is small, and the optical cable cannot be used in increasingly short pipeline resources;
2. the optical fiber ribbon is coated with PBT in an integral coating structure, so that the outer diameter of the optical fiber ribbon is larger, and meanwhile, due to the problem of the PBT material, fingers cannot be used for quick stripping, and the optical fiber ribbon needs to be separated by means of a tool, so that the construction efficiency is seriously influenced;
3. the conventional sleeve contains fiber paste, so that the optical cable needs to be cleaned during construction, and has certain pollution to the environment.
4. The sheath of prior art strengthening band department is circular generally, can't discern the reinforcement position fast, has increaseed the degree of difficulty of vertically peeling or opening the skylight.
Disclosure of Invention
Aiming at the problems that the large-core-number ribbon optical cable has larger outer diameter, the integrally-coated protective layer outside the optical fiber ribbon cannot be quickly stripped and the like, the invention provides the large-core-number ribbon optical cable and the manufacturing method thereof.
A super-large core number ribbon optical cable comprises an optical fiber ribbon, a TPU (thermoplastic polyurethane) ribbon, a reinforcement, a tearing rope, an outer sheath, a water-blocking tape and water-blocking powder; the ribbon optical cable comprises an optical fiber ribbon, a TPU (thermoplastic polyurethane) ribbon, a tearing rope, a reinforcement, a water blocking tape and an outer sheath from inside to outside; the optical fiber ribbon, the water-blocking powder and the TPU tape form an optical cable sleeve, the TPU tape is spirally stranded around the optical fiber ribbon, the water-blocking powder is attached to the optical fiber ribbon and the TPU tape, and the reinforcing piece is embedded in the outer sheath.
Preferably, the optical fiber ribbon is any one of a general optical fiber ribbon, a flexible optical fiber ribbon and a reticular optical fiber ribbon, and the optical fiber ribbon is 12 cores or 24 cores.
Preferably, the number of the TPU belts is more than or equal to 2, the width of the TPU belts is more than or equal to 1.0mm, and the thickness of the TPU belts is 0.1-0.3 mm.
Preferably, the reinforcement is a non-metallic reinforcement, and FRP bands or aramid yarns are used.
Preferably, the outer sheath is convex.
Preferably, a plurality of subunits are twisted together to form a cable core, and a water blocking tape, a reinforcement and a sheath are added to form the ultra-large core number ribbon optical cable.
A manufacturing method of an ultra-large core number ribbon optical cable comprises the following steps:
the method comprises the following steps: passing the optical fiber ribbon with the water-blocking powder through a head of an extruding machine; opening the plastic extruding machine and the traction machine, and extruding the TPU from the arc-shaped opening of the head of the plastic extruding machine to form a plurality of TPU belts;
step two: when the optical fiber ribbon passes through the arc-shaped opening of the head of the extruder at a constant speed, the outer die of the extruder is rotated simultaneously, so that the TPU belt is spirally wound around the optical fiber ribbon;
step three: arranging a water-blocking powder filling device at a position 5cm away from an outer die opening of the plastic extruding machine, enabling the TPU belt to pass through the water-blocking powder filling device, enabling the TPU belt not to be cooled yet and to be in a high-temperature solution state, enabling water-blocking powder to be adhered to the TPU belt, and collecting redundant water-blocking powder by the water-blocking powder filling device;
step four: the optical fiber ribbon added with the water-blocking powder passes through a group of air cooling devices consisting of 4 blow-dryers, and the TPU ribbon is cooled by using compressed air;
step five: the optical fiber ribbon is wound on the disc through a tension pulley to form an optical fiber ribbon unit;
step six: twisting a plurality of optical fiber belt units through a twisting process, longitudinally wrapping the water-blocking tape, and fixing the water-blocking tape outside the twisted subunits by using binding yarns;
step seven: in the sheath process, paying off the cable core through a pay-off rack, and then passing through a head of an extruding machine;
step eight: the reinforcing piece is paid off by using an active pay-off rack and passes through the inner mold; the tearing rope is paid off through an active pay-off rack and enters the inner mold at the outer side of the water blocking tape; arranging the tearing rope at an angle of 180 degrees on a horizontal plane by using a special fixing device; the reinforcing piece passes through the inner die through a hole arranged in the inner die, and the reinforcing pieces on the two sides are arranged at 180 degrees and are positioned on a horizontal plane;
step nine: and fixing the cable core, the tearing rope and the reinforcing piece together, opening the tractor and the plastic extruding machine, extruding sheath materials, and finally forming the ultra-large core number ribbon optical cable.
Preferably, the extruder head is rotatable about an outer die having 3 arcuate openings therein at 120 degrees.
Preferably, the speed range of the optical fiber band passing in the step two is as follows: 10-70 m/min
Preferably, the TPU band is cooled to below 50 ℃ in step four.
Preferably, the air cooling device in the fourth step is a group of 4 extruder horseshoe water blowers, the diameter of the opening is 10mm, and the water blocking powder filling device is an electrostatic powder sieving machine.
Preferably, TPU jackets adopted by the subunits in the optical cable are different in color.
Compared with the closest prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) In the prior art, a layer of PBT is contained outside an optical fiber ribbon to form a conventional sleeve; the sleeve adopts the TPU sheath, the TPU is extruded by the plastic extruding machine to form a plurality of TPU bands, and the plurality of TPU bands are spirally stranded around the optical fiber ribbon to form protection for the internal optical fiber ribbon;
(2) In the prior art, water-blocking materials around a common sleeve are added in the next cabling procedure, but when a plurality of spirally twisted TPU belts just come out of an extruding machine, the TPU belts are not cooled yet and are in a high-temperature melt state, and water-blocking powder can be adhered to the TPU belts to form the water-blocking materials of a cable core; the adding mode of the water-blocking powder is greatly different from the conventional mode, the water-blocking powder is more uniformly distributed, the water-blocking effect is good, one procedure is reduced, and the production efficiency is improved;
(3) The conventional art stiffeners are generally in the middle and outside of the cable core; the reinforcing piece is embedded in the sheath, and the outer diameter of the optical cable can be effectively reduced in the middle and outside of the cable core relative to the reinforcing piece; the reinforcing piece is embedded in the sheath, and can play a role of rapidly stripping the sheath when the optical cable is stripped; in addition, the reinforcing piece is a non-metal reinforcing piece, the FRP belt or aramid yarn is adopted, the bending and forming can be more compact in combination with the sheath, and the extra increase of the thickness of the sheath can not be caused compared with the reinforcing piece embedded in the sheath;
(4) The outer sheath of the prior art is generally round, so that peeling from the reinforcing belt is not easy to distinguish, and the outer sheath at the reinforcing belt of the optical cable is arranged to be convex, so that the position of a reinforcing piece can be quickly identified, and the longitudinal peeling or skylight opening is convenient and quick;
(5) The number of the TPU belts can be 2, 3 or other, and the specific number can be determined according to the size of the outer diameter of the subunit; the width of the TPU belt is determined according to the outer diameter of the subunit, the width is more than or equal to 1.0mm, the maximum width is not limited, the thickness is preferably 0.1-0.3 mm, and the TPU belt can be conveniently and quickly torn by hand; in addition, the plurality of spirally twisted TPU sheaths are in a spiral twisting mode, and the TPU material is soft, so that the TPU sheaths can be quickly peeled off by fingers without any tool, and the working efficiency is improved;
(6) The optical fiber ribbon can adopt common optical fiber ribbons, flexible optical fiber ribbons and reticular optical fiber ribbons, and the number of the optical fiber ribbons in each subunit can be adjusted according to the requirement; the optical fiber ribbon can be 12 cores or 24 cores, and the number of the optical fiber ribbons is determined according to specific situations; the type core number of the optical fiber ribbon can be determined according to the specific situation required, so that the optical fiber ribbon is more favorable for practical operation; the optical cable neutron unit adopts TPU (thermoplastic polyurethane) belts with different colors and different numbers outside the TPU sleeve as the distinction, realizes the identification of the sleeve in the cable, and thus forms the optical cables with different core numbers.
Drawings
FIG. 1 is a schematic structural view of a conventional ribbon optical cable according to the present invention;
FIG. 2 is a schematic view of a ribbon cable of the present invention;
FIG. 3 is a side view of the bushing of the present invention;
wherein: 1. the optical fiber ribbon comprises an optical fiber ribbon 2, a TPU tape 3, a water blocking tape 4, a reinforcing part 5, a tearing rope 6, an outer sheath 7 and water blocking powder.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, the invention provides an ultra-large core number ribbon optical cable, which includes an optical fiber ribbon 1, a TPU tape 2, a reinforcement 4, a rip cord 5, an outer sheath 6, and water-blocking powder 7, wherein the ribbon optical cable is respectively the optical fiber ribbon 1, the TPU tape 2, the rip cord 5, the reinforcement 4, the water-blocking tape 3, and the outer sheath 6 from inside to outside; the optical fiber ribbon 1, the water-blocking powder 7 and the TPU ribbon 2 form an optical cable sleeve; a plurality of TPU belts 2 are twisted around the optical fiber belt 1 in a spiral mode to form protection for the internal optical fiber belt 1; the water-blocking powder 7 is attached to the optical fiber ribbon 1 and the TPU ribbon 2; the reinforcing part 4 is embedded in the outer sheath 6, and the outer diameter of the optical cable can be effectively reduced in the middle and outside of the cable core relative to the reinforcing part 4; when the optical cable is stripped, the function of rapidly stripping the sheath can be achieved.
Further, the optical fiber ribbon 1 is any one of a common optical fiber ribbon, a flexible optical fiber ribbon and a reticular optical fiber ribbon, and the optical fiber ribbon 1 is 12 cores or 24 cores; the type core number of the optical fiber ribbon 1 can be determined according to specific conditions, which is more beneficial to practical operation.
Furthermore, the number of the TPU belts 2 is more than or equal to 2, the width of the TPU belts 2 is more than or equal to 1.0mm, the thickness of the TPU belts 2 is 0.1-0.3 mm, and the TPU belts can be conveniently and quickly torn by hands within the setting range of the width and the thickness.
Further, reinforcement 4 is nonmetal reinforcement, adopts FRP area or aramid yarn, can make crooked, shaping and the sheath coincide inseparabler, inlays the reinforcement in the sheath relatively, can not cause the sheath thickness extra to increase.
Furthermore, the outer sheath 6 is convex, so that the position of the reinforcing part can be quickly identified, and the longitudinal stripping or skylight opening is convenient and quick.
A manufacturing method of an ultra-large core number ribbon optical cable comprises the following steps:
the method comprises the following steps: passing the optical fiber ribbon 1 with the water-blocking powder 7 through the head of an extruding machine; opening the plastic extruding machine, and extruding the TPU from the arc-shaped opening of the head of the plastic extruding machine to form a plurality of TPU belts 2; the sleeve adopts a TPU sheath, the TPU is extruded by a plastic extruding machine to form a plurality of TPU belts, and the plurality of TPU belts are spirally stranded around the optical fiber ribbon to form protection for the internal optical fiber ribbon.
Step two: while the optical fiber ribbon 1 passes through the arc-shaped opening of the head of the extruder at a constant speed of 10 to 70m/min, the outer mold of the extruder is simultaneously rotated so that the TPU tape 2 is spirally wound around the optical fiber ribbon.
Step three: a water-blocking powder filling device is arranged at a position 5cm away from an outer die opening of the plastic extruding machine, the TPU belt 2 passes through the water-blocking powder filling device, at the moment, the TPU belt 2 is not cooled yet and is in a high-temperature solution shape, and water-blocking powder 7 can be adhered to the TPU belt 2 to form a water-blocking material of the cable core; the water-blocking powder filling device collects the redundant water-blocking powder. The water-blocking powder adding mode is greatly different from the conventional mode, the water-blocking powder is more uniformly distributed, the water-blocking effect is good, one process is reduced, and the production efficiency is improved.
Step four: the optical fiber ribbon 1 added with the water-blocking powder 7 passes through a group of air cooling devices consisting of 4 blow dryers, and the TPU ribbon is cooled to below 50 ℃ by using compressed air.
Step five: the optical fiber ribbon 1 is taken up to a disc tool through a tension wheel to form an optical fiber ribbon unit.
Step six: and twisting the plurality of optical fiber belt units through a twisting process, longitudinally wrapping the water-blocking tape, and fixing the water-blocking tape outside the twisted subunits by using binding yarns.
Step seven: in the sheath process, the cable core is paid off through a pay-off rack and then passes through the head of an extruding machine.
Step eight: the reinforcing piece 4 is paid off by using an active pay-off rack and passes through the inner die; the tearing rope is paid off through an active pay-off rack and enters the inner mold at the outer side of the water blocking tape 3; the tearing rope is arranged to be 180 degrees on a horizontal plane by using a special fixing device; the reinforcing members 4 pass through the inner die through holes formed in the inner die, and the reinforcing members 4 on both sides are arranged at 180 degrees on the horizontal plane.
Step nine: and fixing the cable core, the tearing rope and the reinforcing piece together, opening the tractor and the plastic extruding machine, extruding sheath materials, and finally forming the ultra-large core number ribbon optical cable.
Further, the extruder head outer mold was rotatable and had 3 arcuate openings at 120 degrees.
Furthermore, the air cooling device in the fourth step is a group of 4 extruder horseshoe water blowers, the diameter of an opening is 10mm, and the water blocking powder filling device is an electrostatic powder sieving machine.
Furthermore, TPU sheaths adopted by the optical cable sub-units are different in color, and TPU belts with different numbers outside the TPU sleeves are used for distinguishing, so that the identification of the sleeves in the cable is realized, and the optical cables with different core numbers are formed.
Example 1:
take the example of manufacturing 1728 core ribbon cable
The subunit adopts ordinary optical fiber area or netted optical fiber area production 144 core sleeve, and 12 optical fiber areas pass through static powder machine of passing through, add the powder that blocks water for the optical fiber area, then through the extruding machine, add 3 TPU areas for optical fiber area is around, 3 TPU areas are around the optical fiber area with the heliciform transposition, add the filling device of the powder that blocks water at the aircraft nose department of extruding machine for the powder that blocks water coats on the TPU area, form the subunit. 12 subunits are twisted together, after the water-blocking tape is longitudinally wrapped, a sheath embedded with an FRP tape is extruded, and the outer sheath at the FRP tape protrudes to form a 1728-core ribbon-shaped optical cable.
Example 2:
take the example of manufacturing 3456 core ribbon cable
The subunit is characterized in that a 144-core sleeve is produced by adopting a common optical fiber belt or a reticular optical fiber belt, 12 optical fiber belts pass through an electrostatic powder coating machine to add water-blocking powder on the optical fiber belts, then 3 TPU belts are added around the optical fiber belts through a plastic extruding machine, the 3 TPU belts are twisted around the optical fiber belts in a spiral shape, and a filling device of the water-blocking powder is added at the head of the plastic extruding machine, so that the water-blocking powder is coated on the TPU belts to form the subunit. The 24 subunits are twisted together, after the water blocking tape is longitudinally wrapped, a sheath embedded with an FRP tape is extruded, and the outer sheath of the FRP tape protrudes to form the 3456-core ribbon-shaped optical cable.
The principle is as follows: the invention relates to an ultra-large core number ribbon optical cable. Is suitable for more than 576 cores, and can reach 3456 cores at most. The optical cable is a ribbon optical cable with an ultra-large core number, which is formed by taking a plurality of optical fiber ribbons as 1 subunit, then twisting the plurality of subunits together, adding a reinforcing member and extruding an outer sheath.
The subunit adopts full dry-type structure, contains the optical fiber ribbon of certain quantity, and the optical fiber ribbon can adopt ordinary optical fiber ribbon, netted optical fiber ribbon etc. adds the powder that hinders water around the optical fiber ribbon, then adds the TPU sheath and forms the subunit. And extruding a plurality of TPU belts by the TPU sheath through a special die, twisting the plurality of TPU belts around the optical fiber belt in a spiral manner, and adding water-blocking powder on the TPU sheath to form a water-blocking layer of the cable core. The optical cable is formed by twisting a plurality of subunits together and then extruding a sheath inlaid with an FRP tape.
Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can make modifications and equivalents to the embodiments of the present invention without departing from the spirit and scope of the present invention, which is set forth in the claims of the present application.
Claims (10)
1. The utility model provides an ultra large core number ribbon optical cable, includes optical fiber ribbon, TPU area, reinforcement, tears rope, oversheath, water-blocking tape, its characterized in that: the optical fiber ribbon cable comprises an optical fiber ribbon, a TPU (thermoplastic polyurethane) ribbon, a tearing rope, a reinforcing piece, a water blocking tape and an outer sheath from inside to outside, the optical fiber ribbon, the water blocking powder and the TPU ribbon form an optical cable sleeve, the TPU ribbon is spirally stranded around the optical fiber ribbon, the water blocking powder is attached to the optical fiber ribbon and the TPU ribbon, and the reinforcing piece is embedded in the outer sheath.
2. The ultra-large core count optical ribbon cable of claim 1, wherein: the optical fiber ribbon is any one of a common optical fiber ribbon, a flexible optical fiber ribbon and a reticular optical fiber ribbon, and the optical fiber ribbon is 12 cores or 24 cores.
3. The ultra-large core count optical ribbon cable of claim 1, wherein: the number of the TPU belts is more than or equal to 2, the width of the TPU belts is more than or equal to 1.0mm, and the thickness of the TPU belts is 0.1-0.3 mm.
4. The ultra-large core count optical ribbon cable of claim 1, wherein: the reinforcement is a nonmetal reinforcement, and the nonmetal reinforcement is an FRP (fiber reinforced Plastic) belt or aramid yarn.
5. The ultra-large core count optical ribbon cable of claim 1, wherein: the outer sheath is convex.
6. A method for manufacturing a very large core count optical ribbon cable as claimed in any one of claims 1 to 5, wherein: the method comprises the following steps:
the method comprises the following steps: passing the optical fiber ribbon with the water-blocking powder through a head of an extruding machine; opening the plastic extruding machine and the traction machine, and extruding the TPU from the arc-shaped opening of the head of the plastic extruding machine to form a plurality of TPU belts;
step two: when the optical fiber ribbon passes through the arc-shaped opening of the head of the extruding machine at a constant speed, the outer die of the extruding machine rotates simultaneously, so that the TPU tape is spirally wound around the optical fiber ribbon;
step three: arranging a water-blocking powder filling device at a position 5cm away from an outer die opening of the plastic extruding machine, enabling the TPU belt to pass through the water-blocking powder filling device, enabling the TPU belt not to be cooled yet and to be in a high-temperature solution state, enabling water-blocking powder to be adhered to the TPU belt, and collecting redundant water-blocking powder by the water-blocking powder filling device;
step four: the optical fiber ribbon added with the water-blocking powder passes through an air cooling device, and the TPU ribbon is cooled by using compressed air;
step five: the optical fiber ribbon is wound on the disc through a tension pulley to form an optical fiber ribbon unit;
step six: twisting a plurality of optical fiber belt units through a twisting process, longitudinally wrapping the water-blocking tape, and fixing the water-blocking tape outside the twisted subunits by using binding yarns;
step seven: in the sheath process, paying off the cable core through a pay-off rack, and then passing through a head of an extruding machine;
step eight: the reinforcing piece is paid off by using an active pay-off rack and passes through the inner die; the tearing rope is paid off through an active pay-off rack and enters the inner mold at the outer side of the water blocking tape; arranging the tearing rope at an angle of 180 degrees on a horizontal plane by using a special fixing device; the reinforcing piece passes through the inner die through a hole arranged in the inner die, and the reinforcing pieces on the two sides are arranged at an angle of 180 degrees and are positioned on a horizontal plane;
step nine: and fixing the cable core, the tearing rope and the reinforcing piece together, opening the tractor and the plastic extruding machine, and extruding the sheath material to finally form the ultra-large core number ribbon optical cable.
7. The method of claim 6, wherein said method comprises the steps of: the extruder head was rotated on the outer die and 3 arcuate openings were formed in the outer die at 120 degrees.
8. The method of claim 6, wherein the method comprises the steps of: in the second step, the speed range of the optical fiber belt passing at the uniform speed is as follows: 10-70 m/min.
9. The method of claim 6, wherein the method comprises the steps of: in step four the TPU band is cooled to below 50 ℃.
10. The method of claim 6, wherein the method comprises the steps of: the air cooling device in the fourth step is a U-shaped water blower of a group of 4 extruders, and the diameter of an opening is 10mm; the water-blocking powder filling device is an electrostatic powder sieving machine.
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| CN202211196301.7A CN115755293A (en) | 2022-09-29 | 2022-09-29 | Ultra-large core number ribbon optical cable and manufacturing method thereof |
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| CN202211196301.7A CN115755293A (en) | 2022-09-29 | 2022-09-29 | Ultra-large core number ribbon optical cable and manufacturing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116184597A (en) * | 2023-04-19 | 2023-05-30 | 江苏中天科技股份有限公司 | Microbeam cable with netlike microbeam tube and manufacturing process thereof |
| CN116224516A (en) * | 2023-04-19 | 2023-06-06 | 江苏中天科技股份有限公司 | Optical cable |
| CN116560025A (en) * | 2023-07-04 | 2023-08-08 | 西安西古光通信有限公司 | Enhanced optical cable and preparation method thereof |
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2022
- 2022-09-29 CN CN202211196301.7A patent/CN115755293A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116184597A (en) * | 2023-04-19 | 2023-05-30 | 江苏中天科技股份有限公司 | Microbeam cable with netlike microbeam tube and manufacturing process thereof |
| CN116224516A (en) * | 2023-04-19 | 2023-06-06 | 江苏中天科技股份有限公司 | Optical cable |
| CN116224516B (en) * | 2023-04-19 | 2023-10-10 | 江苏中天科技股份有限公司 | Optical cable |
| CN116184597B (en) * | 2023-04-19 | 2023-11-24 | 江苏中天科技股份有限公司 | Microbeam cable with netlike microbeam tube and manufacturing process thereof |
| CN116560025A (en) * | 2023-07-04 | 2023-08-08 | 西安西古光通信有限公司 | Enhanced optical cable and preparation method thereof |
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