CN117075279A - Low-attenuation pressure-resistant underwater optical cable - Google Patents
Low-attenuation pressure-resistant underwater optical cable Download PDFInfo
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- CN117075279A CN117075279A CN202311323573.3A CN202311323573A CN117075279A CN 117075279 A CN117075279 A CN 117075279A CN 202311323573 A CN202311323573 A CN 202311323573A CN 117075279 A CN117075279 A CN 117075279A
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Classifications
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- 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
- G02B6/4407—Optical cables with internal fluted support member
-
- 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
- G02B6/441—Optical cables built up from sub-bundles
-
- 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
- G02B6/4415—Cables for special applications
- G02B6/4427—Pressure resistant cables, e.g. undersea cables
-
- 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
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Insulated Conductors (AREA)
Abstract
The application belongs to the technical field of optical cables, and discloses a low-attenuation pressure-resistant underwater optical cable which comprises optical fibers, optical units, a framework, a reinforcing part, an inner sheath, a buffer interlayer, a middle sheath, an arc-shaped framework, a reinforcing part, a heat-insulating buffer layer and an outer sheath.
Description
Technical Field
The application relates to the technical field of optical cables, in particular to a low-attenuation pressure-resistant underwater optical cable.
Background
The underwater optical cable is mainly used under the underwater environmental conditions of rivers, lakes, shallow seas, coasts, islands and other areas, and the underwater optical cable needs to meet certain conditions in the perennial operation under water, for example: good dampproof and corrosion-proof performance, good compression resistance and tensile resistance, etc.
The underwater optical cable structure in the prior art mainly comprises an optical unit, a reinforcement and a sheath, wherein a metal or plastic lining pipe and the like are arranged in the optical cable structure to protect the optical unit from corrosion and improve strength, and a plurality of layers of reinforcement with circular cross sections, steel tape armors and the like are wound around the optical unit and the metal or plastic lining pipe to resist lateral pressure, tensile force and the like of the optical cable in the use process;
however, under some unexpected situations, the sheath outside the optical fiber is easy to be flattened or stretched and deformed, the mechanical property is not good enough, the optical fiber is stressed to deform or break so as to cause signal transmission attenuation, and after the optical cable is used for a period of time, the sheath breaks the optical fiber to stab out, so that the optical cable structure is thoroughly destroyed.
Disclosure of Invention
The application aims to provide a low-attenuation pressure-resistant underwater optical cable so as to solve the problems in the background technology.
In order to achieve the above purpose, the present application provides the following technical solutions:
a low attenuation, pressure resistant, submarine optical cable comprising:
a light unit including an optical fiber therein;
the framework is of a hexagonal structure, a reinforcing piece is arranged in the center of the framework, the framework is divided into six triangular framework grooves, and each light unit is correspondingly arranged in each triangular framework groove;
the inner sheath is coated on the outer side of the framework;
the buffer interlayer is coated outside the inner sheath and is of a circular triangle structure, the buffer interlayer comprises three arc buffer baffles, an arc middle baffle and three elastic tubes, the three elastic tubes are respectively positioned at corner points of the circular triangle structure, the arc middle baffle surrounds two sides of the elastic tubes, the arc middle baffle is arranged between the buffer baffle and the elastic tubes, a gap is reserved between the arc middle baffle and the elastic tubes, and the arc buffer baffles can extrude the elastic tubes through the arc middle baffle after being stressed;
the middle sheath is coated on the buffer interlayer;
the heat-insulating buffer layer is coated on the middle sheath; and
and the outer sheath is coated on the heat-insulating buffer layer.
Further, the skeleton still includes outside sideboard, center circle and skeleton inner partition board, outside sideboard with the skeleton inner partition board all sets up to six, every the skeleton inner partition board connect in adjacent two corner between the sideboard outside with the center circle forms six triangle skeleton groove, the reinforcement is located in the center circle.
Optionally, the arc buffer baffle and the arc middle baffle are of an integrated structure, and the arc middle baffle, the inner sheath and the middle sheath are of split structures.
Optionally, the arc buffer baffle and the arc middle baffle are of a split structure, and the arc middle baffle connects the inner sheath and the middle sheath into an integrated structure.
Further, the triangle formed by the central lines of the three elastic tubes is an equilateral triangle.
Further, the novel elastic tube comprises three arc-shaped frameworks, wherein the three arc-shaped frameworks are embedded into the middle sheath and correspondingly arranged on the outer side of the elastic tube, reinforcing pieces are further arranged between every two adjacent arc-shaped frameworks, and the three reinforcing pieces are respectively arranged between every two adjacent arc-shaped frameworks.
Further, the reinforcement is a steel strand, and the reinforcement is a steel wire or a reinforced plastic rod or a fiber rod made of glass fiber.
Further, the inner sheath is provided with a sponge body, and the sponge body is filled between the inner sheath and the framework.
Further, the heat preservation buffer layer is made of foam rubber.
Further, the triangular framework groove comprises a drying medium, wherein the drying medium is arranged at the corner of each triangular framework groove.
Compared with the prior art, the low-attenuation pressure-resistant underwater optical cable has the following beneficial effects: the cable core includes the skeleton of hexagonal and sets up the part in the skeleton, the skeleton divide into six triangular groove structures, the tensile compressive strength of optical cable has been improved greatly to the setting of skeleton, correspond every optical unit and place in every triangular groove structure can strengthen the stability of optical unit, the skeleton center is placed the reinforcement and is made the optical cable can bear enough pulling force, the inner sheath sets up the buffering interlayer that arc buffer baffle outward, baffle and elastic tube are constituteed in the arc, the arc buffer baffle promotes arc buffer baffle and then extrudees the elastic tube and can unload external force and reduce the damage to the cable core after the atress, three arc skeleton has been filled in the well sheath simultaneously, arc buffer baffle can be avoided the arc buffer baffle to stab the well sheath under very big pressure, place the reinforcement in the well sheath simultaneously can make the optical cable bear higher pulling force, the compressive capacity of well sheath is placed to the skeleton corner, place the drying medium can absorb the cable core, place between inner sheath and the skeleton and elasticity and fill the sponge can increase shock-absorbing capacity, well and fill shock resistance and thermal insulation between well sheath and the oversheatproof layer can improve the shock resistance and thermal insulation performance that optical cable can improve, this dampproof performance and corrosion resistance.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the application, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are not intended to limit the scope of the application, since any modification, variation in proportions, or adjustment of the size, etc. of the structures, proportions, etc. should be considered as falling within the spirit and scope of the application, without affecting the effect or achievement of the objective.
FIG. 1 is a cross-sectional view of a low attenuation, pressure resistant, undersea optical cable of the present application;
FIG. 2 is a cross-sectional view of a low attenuation, pressure resistant, undersea optical cable of the present application;
FIG. 3 is an enlarged schematic view of a portion of the low attenuation, pressure resistant undersea optical cable of FIG. 1;
FIG. 4 is an enlarged schematic view of a portion of the low attenuation, pressure resistant undersea optical cable of FIG. 2 at b;
in the figure: 1 optical fiber, 2 light units, 3 frameworks, 31 central rings, 32 framework inner partition plates, 33 outer side plates, 4 reinforcing pieces, 5 drying media, 6 inner jackets, 7 sponges, 8 arc buffer partition plates, 81 arc middle partition plates, 9 elastic tubes, 10 middle jackets, 11 arc frameworks, 12 reinforcing pieces, 13 heat-insulating buffer layers and 14 outer jackets.
Detailed Description
In order to make the objects, features and advantages of the present application more comprehensible, the technical solutions in the embodiments of the present application are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The technical scheme of the application is further described below by the specific embodiments with reference to the accompanying drawings.
Referring to fig. 1-2, the present application provides a technical solution:
a low attenuation, pressure resistant, submarine optical cable comprising:
a light unit 2, wherein the light unit 2 comprises an optical fiber 1;
skeleton 3, skeleton 3 is the hexagon structure, skeleton 3 divide into six triangle skeleton grooves, every light unit 2 correspond set up in every triangle skeleton inslot, light unit 2 set up to six light unit 2 set up in skeleton 3 adopts embedded skeleton structure as the cable core can promote holistic hardness and the anti side pressure performance of optical cable, also can provide effectual supporting role to outside extrusion, has hardness height, light in weight, the excellent and the excellent characteristics of anti side pressure performance of blocking water.
The center of skeleton 3 is equipped with reinforcement 4, reinforcement 4 can be the steel strand wires, and reinforcement 4's setting can improve the anti extrusion ability, tensile strength and the anti intensity of buckling of optical cable, increase the toughness of optical cable, prevent that the optical cable from breaking in the work progress, and then improves the comprehensive properties and the life of optical cable, can regard reinforcement 4 as the traction when being under construction simultaneously.
The inner sheath 6, the cladding of inner sheath 6 is in the skeleton 3 outside, the inner sheath 6 can adopt high density polyethylene cover to ensure insulating effect, promotes holistic waterproof and corrosion-resistant ability, and inner sheath 6 can protect skeleton 3, avoids skeleton 3 direct contact buffering interlayer's arc buffering baffle 8, has certain cushioning effect.
Buffer interlayer, buffer interlayer cladding in the inner sheath 6 is outside, buffer interlayer is circular triangle structure, buffer interlayer is inside to include three arc buffer baffle 8, baffle 81 in the arc, three elastic tube 9, and three in the arc baffle 9 are located respectively the angular point department of circular triangle structure, baffle 81 surrounds in the arc elastic tube 9's both sides, baffle 81 locates in the arc baffle 8 with between the elastic tube 9, baffle 81 in the arc with leave the clearance between the elastic tube 9, baffle 81 in the arc with baffle 8 has certain flexibility and material harder in the arc can pass through baffle 81 extrusion in the arc elastic tube 9 after the atress, the radian of baffle 8 corresponds to inner sheath 6 in the arc baffle 81 the radian corresponds in the elastic tube 9, baffle 81 in the arc shape and elastic tube 9 looks adaptation can more convenient extrusion elastic tube 9 in the arc baffle 8 baffle shape can prevent to act on in the arc buffer baffle 8 after the baffle 10 punctures easily, and the triangle-shaped has stability that makes the effect can not be reduced directly to the shock attenuation core because of the effect is used for the outer cable is avoided to the outer cable to the effect, the outer shock attenuation is not directly unloaded to the effect.
The middle sheath 10 is coated on the buffer interlayer, the material and performance of the middle sheath 10 are the same as those of the inner sheath 6, the middle sheath is provided with a certain thickness, and the middle sheath is a carrier of the reinforcing piece 12 and the arc-shaped framework 11, so that a part of force can be removed when the optical cable is extruded by external force.
The arc-shaped frameworks 11, the arc-shaped frameworks 11 are three, are filled in the middle sheath 10 and correspondingly arranged on the outer sides of the elastic tubes 9, and the arc-shaped frameworks 11 wrap the elastic tubes 9 to protect the elastic tubes 9 and prevent the elastic tubes 9 from being damaged due to overlarge pressure.
The reinforcing member 12 is a steel wire or a fiber rod made of a nonmetallic material, such as a reinforced plastic rod or glass fiber, the reinforcing member 12 is embedded in the middle sheath 10, the strength of the middle sheath 10 is enhanced by the arrangement of the reinforcing member 12, the bearable tensile force and the compressive capacity of the optical cable are improved, and the optical cable works under high water pressure.
The heat insulation buffer layer 13, the heat insulation buffer layer 13 is coated on the middle sheath 10, and the heat insulation buffer layer 13 can compress and offset the pressure generated by collision and extrusion when the optical cable collides and extrudes.
And an outer sheath 14, wherein the outer sheath 14 is wrapped on the heat insulation buffer layer 13, and the outer sheath 14 has the same material and performance as those of the inner sheath 6.
Further, the framework 3 further includes an outer side plate 33, a central ring 31 and an inner framework partition plate 32, the outer side plate 33 and the inner framework partition plate 32 are six, each inner framework partition plate 32 is connected between two adjacent outer side plates 33 and the central ring 31 to form six triangular framework grooves, each light unit 2 is arranged in a triangle formed by three sides of each triangular framework groove, each triangular framework groove protects the light units 2 placed in the triangular framework grooves, and the reinforcing member 4 is arranged in the central ring 31.
Optionally, referring to fig. 3, the arc buffer baffle 8 and the arc middle baffle 81 are of an integral structure, the arc middle baffle 81, the inner sheath 6 and the middle sheath 10 are of a split structure, when the optical cable is extruded from the outside, the arc buffer baffle 8 can generate displacement, and because the arc buffer baffle 8 and the arc middle baffle 81 are of an integral structure, the arc buffer baffle 8 can drive the arc middle baffle 81 to extrude the elastic tube 9, and the elastic tube 9 is stressed and deformed to bear external force, so that the external force is transmitted to the inner sheath 6 and the framework 3, and the isolation of the external force is realized.
Optionally, referring to fig. 4, the arc buffer baffle 8 and the arc middle baffle 81 are of a split structure, the arc middle baffle 81 connects the inner sheath 6 and the middle sheath 10 into an integral structure, and because the arc buffer baffle 8 and the arc middle baffle 81 are of a split structure, the arc buffer baffle 8 generates displacement when the optical cable is extruded from the outside, the arc buffer baffle 8 can extrude the arc middle baffle 81 to further extrude the elastic tube 9, and the elastic tube 9 is stressed and deformed to bear external force, so that the transmission of the external force to the inner sheath 6 and the framework 3 can be reduced.
Further, the triangle formed by the central lines of the three elastic tubes 9 is an equilateral triangle, and the arrangement can enable the stability of the buffer interlayer to be stronger, the stress to be more uniform and the shock absorption and buffer effect to be better.
Further, the novel cable is characterized by further comprising three arc frameworks 11, wherein the three arc frameworks 11 are embedded into the middle sheath 10 and correspondingly arranged on the outer side of the elastic tube 9, reinforcing pieces 12 are further arranged between the adjacent arc frameworks 11, the three reinforcing pieces 12 are respectively arranged between the two adjacent arc frameworks 11, the reinforcing pieces 12 can be steel wires, the reinforcing pieces 12 and the arc frameworks 11 are combined and embedded into the middle sheath 10 to form an armored structure, the strength and the wear resistance of the cable are enhanced, the cable can be better resisted from being damaged by underwater organisms, and the rigidity of the cable is greatly improved.
Further, the novel optical fiber cable further comprises a sponge body 7, the sponge body 7 is filled between the inner sheath 6 and the framework 3, the sponge body 7 absorbs the force applied to the optical fiber cable to a certain extent, the external force is prevented from directly acting on the framework 3 through the inner sheath 6, the novel optical fiber cable has certain buffering and shock absorbing capacity, the service life of the optical fiber cable is prolonged, the extrusion force applied to the optical fiber cable is dispersed, and the extrusion resistance and bending resistance strength of the reinforced framework 3 are further improved.
Further, the thermal insulation buffer layer 13 is made of foam rubber, and the foam rubber can be made into rubber products, has the functions of light weight, softness, elasticity, difficult heat transfer, waterproof, shock absorption, impact alleviation, extrusion, heat insulation, sound insulation and the like, and can reduce the impact force through the thermal insulation buffer layer 13 when external force impacts the optical cable, further reduce the impact force through the shrinkage of the arc-shaped buffer baffle 8 and the elastic tube 9 and protect the optical fiber through the structures of the sponge 7 and the framework 3.
Further, the utility model also comprises a drying medium 5, the drying medium 5 is arranged at the corners of each triangular framework groove, the drying medium 5 can be a drying bar or a drying agent, the drying bar can be a diatomite drying bar, the diatomite drying bar has good hygroscopicity and air permeability, can effectively prevent moisture and humidity, in addition, the diatomite dried strip has good antibacterial property, and can effectively inhibit the growth of bacteria, so that the pollution of the bacteria to the framework 3 is prevented, and has good oxidation resistance, so that the framework 3 is effectively prevented from being damaged by oxidation, and the service life of the framework 3 is prolonged.
The drying agent can remove moisture in the wet substances, and the main components are calcium chloride and collagen, and chemically react water molecules with the calcium chloride to absorb moisture from the surrounding environment and convert the moisture into gel, so that the adsorption effect is achieved, and the moisture between the inner sheath 6 and the framework 3 can be removed, so that the drying effect is achieved.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A low attenuation, pressure resistant, submarine optical cable comprising:
a light unit including an optical fiber therein;
the framework is of a hexagonal structure, a reinforcing piece is arranged in the center of the framework, the framework is divided into six triangular framework grooves, and each light unit is correspondingly arranged in each triangular framework groove;
the inner sheath is coated on the outer side of the framework;
the buffer interlayer is coated outside the inner sheath and is of a circular triangle structure, the buffer interlayer comprises three arc buffer baffles, an arc middle baffle and three elastic tubes, the three elastic tubes are respectively positioned at corner points of the circular triangle structure, the arc middle baffle surrounds two sides of the elastic tubes, the arc middle baffle is arranged between the buffer baffle and the elastic tubes, a gap is reserved between the arc middle baffle and the elastic tubes, and the arc buffer baffles can extrude the elastic tubes through the arc middle baffle after being stressed;
the middle sheath is coated on the buffer interlayer;
the heat-insulating buffer layer is coated on the middle sheath; and
and the outer sheath is coated on the heat-insulating buffer layer.
2. The low attenuation, pressure resistant, underwater optical cable of claim 1 wherein the skeleton further comprises outer side plates, a central ring and skeleton inner partition plates, the outer side plates and the skeleton inner partition plates are six, each of the skeleton inner partition plates is connected to the central ring and the corner points between two adjacent outer side plates to form six triangular skeleton grooves, and the reinforcement is arranged in the central ring.
3. The low attenuation, pressure resistant, submarine optical cable according to claim 1, wherein the arc-shaped buffer baffle and the arc-shaped middle baffle are of an integral structure, and the arc-shaped middle baffle, the inner sheath and the middle sheath are of a split structure.
4. The low attenuation, pressure resistant, submarine optical cable according to claim 1, wherein the arc-shaped buffer spacer and the arc-shaped middle spacer are of a split structure, and the arc-shaped middle spacer connects the inner jacket and the middle jacket as a single structure.
5. The low attenuation, pressure resistant, submarine optical cable according to claim 1, wherein the triangle formed by the centerlines of the three elastic tubes is an equilateral triangle.
6. The low attenuation pressure-resistant underwater optical cable according to claim 1, further comprising three arc-shaped frameworks, wherein the three arc-shaped frameworks are embedded in the middle sheath and correspondingly arranged on the outer side of the elastic tube, reinforcing pieces are further arranged between the adjacent arc-shaped frameworks, and the three reinforcing pieces are respectively arranged between the two adjacent arc-shaped frameworks.
7. The low attenuation, pressure resistant, submarine optical cable according to claim 6, wherein the strength members are steel strands and the strength members are steel wires or reinforced plastic rods or fiber rods made of glass fibers.
8. The low attenuation, pressure resistant, submarine optical cable according to claim 1, further comprising a sponge filled between the inner jacket and the backbone.
9. The low attenuation, pressure resistant, underwater optical cable of claim 1 wherein the insulating buffer layer is a foam rubber material.
10. The low attenuation, pressure resistant, submarine optical cable according to claim 1, further comprising a drying medium disposed at the corners of each of the triangular skeleton grooves.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311323573.3A CN117075279B (en) | 2023-10-13 | 2023-10-13 | Low-attenuation pressure-resistant underwater optical cable |
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| CN202311323573.3A CN117075279B (en) | 2023-10-13 | 2023-10-13 | Low-attenuation pressure-resistant underwater optical cable |
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| CN117075279B CN117075279B (en) | 2023-12-26 |
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| CN209765122U (en) * | 2019-05-30 | 2019-12-10 | 江苏华脉光电科技有限公司 | Impact-resistant direct-buried optical cable |
| CN211905803U (en) * | 2020-03-16 | 2020-11-10 | 苏州瑞力特通信科技有限公司 | Butterfly-shaped optical cable with impact resistance |
| CN213302610U (en) * | 2020-08-13 | 2021-05-28 | 国友线缆集团有限公司 | Waterproof optical cable |
| CN214774371U (en) * | 2021-06-28 | 2021-11-19 | 江苏马园电力科技有限公司 | Impact-resistant high-strength power tube |
| CN214847818U (en) * | 2021-07-01 | 2021-11-23 | 安徽新亚特电缆科技有限公司 | Silicon rubber insulation control cable |
| CN217506208U (en) * | 2022-04-13 | 2022-09-27 | 和瑞新材料科技(江阴)有限公司 | Optical cable communication extra-high zinc layer steel wire rope |
| CN217385920U (en) * | 2022-06-14 | 2022-09-06 | 富通嘉善光纤光缆技术有限公司 | Optical cable |
| CN115480352A (en) * | 2022-10-18 | 2022-12-16 | 江苏中天科技股份有限公司 | Self-supporting optical cable |
| CN116203689A (en) * | 2022-12-30 | 2023-06-02 | 飞讯达（厦门）信息技术有限公司 | Outdoor single-mode optical cable |
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| CN117075279B (en) | 2023-12-26 |
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