CN216487404U - Tensile, bending-resistant, twisting-resistant and wear-resistant composite cable - Google Patents
Tensile, bending-resistant, twisting-resistant and wear-resistant composite cable Download PDFInfo
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- CN216487404U CN216487404U CN202122610105.7U CN202122610105U CN216487404U CN 216487404 U CN216487404 U CN 216487404U CN 202122610105 U CN202122610105 U CN 202122610105U CN 216487404 U CN216487404 U CN 216487404U
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Abstract
A tensile, bending-resistant, torsion-resistant and wear-resistant composite cable is characterized in that a power core wire set, a communication core shielding wire set and a cable core reinforcing wire are twisted to form a cable core, the ratio of the twist pitch diameter is not more than 12 times, and a cable core outer winding cladding layer, an armor layer and an outer sheath are sequentially wrapped outside the cable core; the power core wire set is structurally characterized in that tinned copper wires are bundled to form power conductor strands, a plurality of power conductor strands and a power conductor reinforcing wire are stranded and then wrapped with a power wire core insulating layer to form a power wire core, and a plurality of power wire cores and a plurality of power wire core reinforcing wires are stranded to form the power core wire set; the structure of the communication core shielding wire group is that tinned copper wires are bundled to form communication conductor strands, a plurality of communication conductor strands and a communication conductor reinforcing wire are stranded and then externally wrapped by a communication wire core insulating layer to form a communication wire core, a plurality of communication wire cores and a plurality of communication wire core reinforcing wires are stranded to form the communication core wire group, and an externally wrapped shielding layer of the communication core wire group forms the communication core shielding wire group.
Description
Technical Field
This technical scheme belongs to cable technical field, specifically is a tensile, resistant winding, resistant twisting, wear-resisting composite cable.
Background
In recent years, special equipment in China is developed more and more quickly, the requirements on cables are higher and more, some special equipment has severe requirements on the cables such as tensile strength, bending resistance, twisting resistance, wear resistance and the like, the existing cables are used in severe environments such as twisting, bending, pulling, grinding and the like, the problems of short service life, conductor core breakage, sheath cracking and the like occur, and a tensile strength, bending resistance, twisting resistance and wear resistance composite cable is urgently needed to be developed in a targeted matching manner, so that the problem of matching the special equipment with the cables is solved. The invention mainly introduces the development and production conditions of a tensile, bending-resistant, torsion-resistant and abrasion-resistant composite cable.
Disclosure of Invention
In order to solve the problems of short service life, broken core of a conductor, cracking of a sheath and the like of the existing cable, improve the tensile strength of the cable, resist winding, torsion and abrasion, enable the cable to be under the action of severe environments such as strong pulling force, winding, torsion, abrasion and the like, be not less than 5 years in long-term operation service life, avoid the problems of broken core of the conductor, cracking of the sheath and the like, provide a tensile, torsion-resistant and abrasion-resistant composite cable, and the structure is as follows: the power core wire set, the communication core shielding wire set and the cable core reinforcing wires are twisted to form a cable core, the twisting pitch-diameter ratio is not more than 12 times, and a cable core outer winding layer, an armor layer and an outer sheath are sequentially wrapped outside the cable core;
the structure of the power core wire group is
The power conductor compound yarn is formed by combining tinned copper wires, and the ratio of the combined pitch to the diameter is not more than 15 times; the power conductor reinforcing wire is formed by aramid fiber bundles, and the ratio of the bundle joint diameter is preferably not more than 20 times;
after being twisted, a plurality of power conductor strands and one power conductor reinforcing wire are wrapped with a power wire core insulating layer (the thickness of the power wire core insulating layer is 0.2-0.8 mm) to form a power wire core, and the twisting pitch diameter ratio is not more than 15 times;
the power core wire group is formed by twisting a plurality of power core wires and a plurality of power core wire reinforcing wires, and the twisting pitch diameter ratio is not larger than 12 times; the power wire core reinforcing wire is formed by aramid fiber bundles, and the ratio of the bundle pitch to the diameter is not more than 20 times;
the structure of the communication core shielding wire group is
The tinned copper wire bundle is combined to form a communication conductor folded wire, and the ratio of the combined pitch to the diameter is not more than 15 times; aramid fiber bundles are combined to form the communication conductor reinforcing wire, and the ratio of the bundle joint to the diameter is preferably not more than 20 times;
after being twisted, a plurality of communication conductor strands and one communication conductor reinforcing wire are wrapped with a communication wire core insulating layer (the thickness of the communication wire core insulating layer is 0.15-0.8 mm) to form a communication wire core, and the twist pitch diameter ratio is not more than 15 times;
the communication wire cores and the communication wire core reinforcing wires are twisted to form a communication wire group, and the twist pitch ratio is preferably not more than 12 times; the communication wire core reinforcing wire is formed by aramid fiber bundles, and the ratio of the bundle pitch to the diameter is not more than 20 times;
the communication core wire group is wrapped with a shielding layer to form a communication core shielding wire group, the shielding layer is formed by weaving tinned copper wires, and the weaving coverage rate is not less than 75%;
the cable core reinforcing wire is formed by aramid fiber bundles, and the ratio of the bundle pitch to the diameter is not more than 20 times;
the cable core outer wrapping layer is formed by overlapping and wrapping semi-conducting tapes, the wrapping and covering rate is not less than 15%, and the wrapping direction is opposite to the twisting direction of the cable core;
the armor layer is formed by weaving tinned copper wires, and the weaving density of the tinned copper wires is not less than 88%;
the outer sheath is made of sheath materials, and the thickness of the outer sheath is 1.5-5 mm.
Specifically, the method comprises the following steps:
in the power wire core, the power conductor reinforcing wire is in the axial position, and a plurality of power conductor stranded wires are symmetrical around the communication conductor reinforcing wire. In the power wire core, the sectional area of the conductor is 1-35 mm2(ii) a In the power conductor compound yarn, the wire diameter of the tinned copper wire is 0.10-0.30 mm, and the wire diameter of the power conductor compound yarn is 0.2-3.0 mm.
In the communication wire core, the communication conductor reinforcing wire is in an axial position, and the plurality of communication conductor strands are symmetrical around the communication conductor reinforcing wire. In the communication wire core, the cross-sectional area of the conductor is 0.35-4.0 mm2(ii) a In the communication conductor compound yarn, the wire diameter of the tinned copper wire is 0.10-0.25 mm, and the wire diameter of the communication conductor compound yarn is 0.2-1.0 mm.
The power wire core insulating layer and the communication wire core insulating layer are formed by extruding crosslinked polyethylene;
the precision of power sinle silk insulating layer and communication sinle silk insulating layer does: the thickness of the thinnest part is not less than 90-0.1 mm of the nominal thickness, and the maximum thickness on any cross section is not less than 1.4 times of the minimum thickness.
In the cable core, the power core wire group and the communication core shielding wire group are sequentially and adjacently arranged, and the cable core reinforcing wire is arranged in a gap between the power core wire group and the communication core shielding wire group.
In a shielding layer of the communication core shielding wire set, the wire diameter of a tinned copper wire is 0.10-0.30 mm;
in the armor layer, the wire diameter of the tinned copper wire is 0.15-0.30 mm;
the outer sheath is made of cross-linked polyolefin sheath material; the precision of the outer sheath is as follows: the average thickness is not less than the nominal thickness, the thinnest portion of the outer jacket is not less than 1.5mm, and the maximum thickness is not greater than 1.66 times the minimum thickness at any cross-section.
Through the specific design of materials and structures, the cable passes more than 1000 times of cyclic tests, the on-off performance of a wire core, the state of an outer sheath of the cable at a set position, the insulation resistance and the like meet the requirements, the overall tensile strength of the cable is excellent, the action of bearing a severe environment is improved, and the service life of the cable is not less than 5 years; the risk of equipment failure caused by conductor core breakage can not occur, and the cable sheath can not crack. The application of the technology can solve the problem of matching of special equipment cables in China and synchronously solve the bottleneck problems of tensile, wear-resisting, winding-resisting and torsion-resisting performances of the cables.
Drawings
FIG. 1 is a schematic radial cross-sectional view of a cable of the present example;
in the figure: the power conductor compound yarn comprises a power conductor compound yarn 1, a power conductor reinforcing wire 2, a power core insulating layer 3, a power core reinforcing wire 4, a communication conductor compound yarn 5, a communication conductor reinforcing wire 6, a communication core insulating layer 7, a communication core reinforcing wire 8, a shielding layer 9, a cable core reinforcing wire 10, a cable core outer winding cladding 11, an armor layer 12 and an outer sheath 13.
Detailed Description
The technical solution is further described below with reference to specific examples as follows:
referring to fig. 1, a tensile, winding-resistant, torsion-resistant and wear-resistant composite cable is structurally characterized in that a power core wire set, a communication core shielding wire set and a cable core reinforcing wire are twisted to form a cable core, the ratio of the twisting pitch to the twisting pitch is not more than 12 times, and a cable core outer winding cladding, an armor layer and an outer sheath are sequentially wrapped outside the cable core;
-the structure of the power cord set is
The power conductor folded yarn 1 is formed by bundling tinned copper wires, and the bundling joint ratio is not more than 15 times; the power conductor reinforcing wire 2 is formed by aramid fiber bundles, and the ratio of the bundle joint diameter is preferably not more than 20 times;
after being twisted, a plurality of power conductor strands and one power conductor reinforcing wire 5 are wrapped with a power wire core insulating layer 3 to form a power wire core, and the twist pitch diameter ratio is not more than 15 times; the thickness of the power wire core insulating layer is 0.2-0.8 mm;
the power core wire group is formed by twisting a plurality of power core wires and a plurality of power core wire reinforcing wires, and the twisting pitch diameter ratio is not larger than 12 times; the power wire core reinforcing wire is formed by aramid fiber bundles, and the ratio of the bundle pitch to the diameter is not more than 20 times;
-the structure of the communication core shielding wire group is
The communication conductor folded yarn 5 is formed by bundling tinned copper wires, and the bundling pitch diameter ratio is not more than 15 times; the communication conductor reinforcing wire 6 is formed by aramid fiber bundles, and the ratio of the bundle joint to the diameter is preferably not more than 20 times;
after being twisted, a plurality of communication conductor strands and one communication conductor reinforcing wire are wrapped with a communication wire core insulating layer 7 to form a communication wire core, and the twist pitch ratio is not more than 15 times; the thickness of the insulating layer of the communication wire core is 0.15-0.8 mm;
the plurality of communication wire cores and the plurality of communication wire core reinforcing wires 8 are twisted to form a communication wire group, and the twist pitch-diameter ratio is preferably not more than 12 times; the communication wire core reinforcing wire is formed by aramid fiber bundles, and the ratio of the bundle pitch to the diameter is not more than 20 times;
the communication core wire group is wrapped with a shielding layer 9 to form a communication core shielding wire group, the shielding layer is formed by weaving tinned copper wires, and the weaving coverage rate is not less than 75%;
the cable core reinforcing wire 10 is formed by aramid fiber bundle, and the bundle joint ratio is not more than 20 times;
the cable core outer winding cladding 11 is formed by overlapping and wrapping semi-conducting tapes, the wrapping and covering rate is not less than 15%, and the wrapping direction is opposite to the twisting direction of the cable core;
the armor layer 12 is formed by weaving tinned copper wires, and the weaving density of the tinned copper wires is not less than 88%;
the outer sheath 13 is made of sheath materials, and the thickness of the outer sheath is 1.5-5 mm.
In the power wire core:
the power conductor reinforcing wire is arranged at the axis position, and the plurality of power conductor strands are symmetrical around the power conductor reinforcing wire;
in the power wire core, the sectional area of the conductor is 1-35 mm2；
In the power conductor compound yarn, the wire diameter of the tinned copper wire is 0.10-0.30 mm, and the wire diameter of the power conductor compound yarn is 0.2-3.0 mm.
In the communication core:
the communication conductor reinforcing wire is in an axial position, and the plurality of communication conductor strands are symmetrical around the communication conductor reinforcing wire;
in the communication wire core, the cross-sectional area of the conductor is 0.35-4.0 mm2；
In the communication conductor compound yarn, the wire diameter of the tinned copper wire is 0.10-0.25 mm, and the wire diameter of the communication conductor compound yarn is 0.2-1.0 mm.
The power wire core insulating layer and the communication wire core insulating layer are formed by extruding crosslinked polyethylene;
the precision of power sinle silk insulating layer and communication sinle silk insulating layer does: the thickness of the thinnest part is not less than 90-0.1 mm of the nominal thickness, and the maximum thickness on any cross section is not less than 1.4 times of the minimum thickness.
In the cable core:
the power core wire group and the communication core shielding wire group are sequentially and adjacently arranged, and the cable core reinforcing wire is arranged in a gap between the power core wire group and the communication core shielding wire group.
In the shielding layer of the communication core shielding wire group: the wire diameter of the tinned copper wire is 0.10-0.30 mm.
In the armor:
the wire diameter of the tinned copper wire is 0.15-0.30 mm.
The outer sheath is made of cross-linked polyolefin sheath material; the precision of the outer sheath is as follows: the average thickness is not less than the nominal thickness, the thinnest portion of the outer jacket is not less than 1.5mm, and the maximum thickness is not greater than 1.66 times the minimum thickness at any cross-section.
In this example:
in the power wire core, the power conductor reinforcing wire is in the axial position, and a plurality of power conductor stranded wires are symmetrical around the communication conductor reinforcing wire. In the power wire core, the cross-sectional area of the conductor is 2mm2(ii) a In the power conductor stranded wire, the wire diameter of the tinned copper wire is 0.15mm, and the wire diameter of the power conductor stranded wire is 0.75 mm. The thickness of the power wire core insulation layer is 0.4 mm.
In the communication wire core, the communication conductor reinforcing wire is in an axial position, and the plurality of communication conductor strands are symmetrical around the communication conductor reinforcing wire. In the communication wire core, the cross-sectional area of the conductor is 0.75mm2(ii) a In the communication conductor stranded wire, the wire diameter of the tinned copper wire is 0.15mm, and the wire diameter of the communication conductor stranded wire is 0.45 mm. The thickness of the insulating layer of the communication wire core is 0.3 mm.
The power wire core insulating layer and the communication wire core insulating layer are formed by extruding crosslinked polyethylene; the present example uses a high electrical performance, high strength crosslinked polyethylene insulation.
The precision of power sinle silk insulating layer and communication sinle silk insulating layer does: the thickness of the thinnest part is not less than 90-0.1 mm of the nominal thickness, and the maximum thickness on any cross section is not less than 1.4 times of the minimum thickness.
In the cable core, the power core wire group and the communication core shielding wire group are sequentially and adjacently arranged, and the cable core reinforcing wire is arranged in a gap between the power core wire group and the communication core shielding wire group.
In a shielding layer of the communication core shielding wire set, the wire diameter of a tinned copper wire is 0.2 mm;
in the armor layer, the wire diameter of the tinned copper wire is 0.2 mm;
the outer sheath is made of cross-linked polyolefin sheath material; the precision of the outer sheath is as follows: the average thickness is not less than the nominal thickness, the thinnest portion of the outer jacket is not less than 1.5mm, and the maximum thickness is not greater than 1.66 times the minimum thickness at any cross-section. The thickness of the outer sheath is 2.5 mm. The embodiment adopts a cross-linked polyolefin sheath material with high wear resistance and cracking resistance.
In this example, there are 2 power core wire sets and 2 communication core shielding wire sets respectively; 3 power wire cores in the power wire core group are provided; the number of the communication wire cores in the communication wire core shielding group is 4. The conductor sectional area in a single power wire core is 2mm2(ii) a The conductor sectional area in a single power wire core is 0.75mm2。
With reference to figure 1 of the drawings,
the power conductor reinforcing wire is formed by bundling 1 strand of 6320dtex aramid fiber, the bundling direction is the left direction, and the bundling pitch-diameter ratio is not more than 20 times; the power conductor folded yarn is formed by bundling 6 strands of 19/0.150mm tinned copper wires, and the bundling pitch-diameter ratio is preferably not more than 15 times;
the communication conductor reinforcing wire is formed by bundling 1 strand of 3160dtex aramid fiber, the bundling direction is the left direction, and the bundling pitch-diameter ratio is not more than 20 times; the communication conductor stranded wire is formed by combining 6 strands of 7/0.150mm tinned copper wires; the binding joint ratio is preferably not more than 15 times;
the power wire core reinforcing wire at the central position is formed by bundling 1 strand of 3160dtex aramid fiber, the power wire core reinforcing wires at the side positions of 3 groups are respectively formed by bundling 7 strands of 6320dtex aramid fiber, and the bundling joint ratio is preferably not more than 20 times.
The communication conductor reinforcing wire at the central position is formed by combining 1 strand of 3160dtex +1 strand of 6320dtex aramid fiber, the communication conductor reinforcing wires at the side positions of 4 groups are respectively formed by combining 2 strands of 6320dtex aramid fiber, and the ratio of the combined pitch diameter is preferably not more than 20 times;
the cable core reinforcing wire at the center position is formed by combining 13 strands of 6320dtex aramid fibers, and the ratio of the combined pitch to the diameter is preferably not more than 20 times.
The power conductor reinforcing wire, the power wire core reinforcing wire, the communication conductor reinforcing wire, the communication wire core reinforcing wire and the cable core reinforcing wire have the characteristics of tensile, bending and torsion resistant elements, and adopt aramid fibers with flame retardance, heat resistance and radiation resistance. Aramid fiber is a high-tech synthetic fiber; placing aramid fibers with different sizes aiming at different gaps; in addition, the filling material has the excellent performances of ultrahigh strength, high modulus, high temperature resistance, acid and alkali resistance, light weight and the like, the strength of the filling material is 5-6 times that of a steel wire, the modulus of the filling material is 2-3 times that of the steel wire or glass fiber, the toughness of the filling material is 2 times that of the steel wire, the weight of the filling material is only about 1/5 times that of the steel wire, and the filling material is not decomposed and melted at the temperature of 560 ℃. It has good insulating property and ageing resistance, and has long life cycle.
Through detection, the cable has the characteristics that:
1) high tensile strength
The gaps between the center and the side of the power core wire group and the communication core wire group, the gaps between the center and the side of the power/communication conductor strand and the center of the twisted power/communication conductor strand are filled and reinforced by aramid fibers, so that the integral tensile strength of the cable is improved, the influence of the cable on bearing the severe environment is delayed and weakened, and the service life of the cable is prolonged.
2) Good torsion and bending resistance
The twisting resistance and the bending resistance of the conductor are further improved by increasing the twisting length of the tin-plated copper wires in each conductor, reducing the twisting pitch-diameter ratio and increasing the number of aramid fibers, the influence of the severe environment action borne by the cable is delayed and weakened, and the service life of the cable is prolonged.
3) Low risk of failure
And a three-wire group power core and a four-wire group communication core structure is adopted, so that the equipment fault risk caused by core breakage is reduced.
4) Long break time of armouring and shielding
By increasing the diameters of the tinned copper wires for sub-shielding and the tinned copper wires for woven armoring, the coverage rate of the sub-shielding and the woven armoring is reduced to be not less than 75%, and the sub-shielding and armoring fracture time in the dynamic operation process of the product is prolonged.
5) The sheath is wear-resistant and has low cracking risk
The sheath adopts cross-linked polyolefin material, has excellent environmental aging resistance and wear resistance, does not wrap the semi-conductive isolation layer after branch shielding and armor, and to a great extent has reduced the cable core external diameter, suitably increases sheath thickness in finished cable external diameter within range, can reduce cable operation in-process sheath fracture and wearing and tearing risk.
Claims (8)
1. A tensile, anti-winding, anti-twisting and wear-resistant composite cable is characterized in that a power core wire set, a communication core shielding wire set and a cable core reinforcing wire are twisted to form a cable core, the ratio of the twisting pitch diameter is not more than 12 times, and a cable core outer winding cladding, an armor layer and an outer sheath are sequentially wrapped outside the cable core;
the structure of the power core wire group is
The power conductor compound yarn is formed by combining tinned copper wires, and the ratio of the combined pitch to the diameter is not more than 15 times; the power conductor reinforcing wire is formed by aramid fiber bundles, and the ratio of the bundle pitch to the diameter is not more than 20 times;
after being stranded, a plurality of power conductor strands and one power conductor reinforcing wire are wrapped with a power wire core insulating layer to form a power wire core, and the stranding pitch diameter ratio is not more than 15 times; the thickness of the power wire core insulating layer is 0.2-0.8 mm;
the power core wire group is formed by twisting a plurality of power core wires and a plurality of power core wire reinforcing wires, and the twisting pitch diameter ratio is not more than 12 times; the power wire core reinforcing wire is formed by aramid fiber bundles, and the ratio of the bundle pitch to the diameter is not more than 20 times;
the structure of the communication core shielding wire group is
The tinned copper wire bundle is combined to form a communication conductor folded wire, and the ratio of the combined pitch to the diameter is not more than 15 times; aramid fiber bundles form a communication conductor reinforcing wire, and the ratio of the bundle joint diameter is not more than 20 times;
after being twisted, a plurality of communication conductor strands and one communication conductor reinforcing wire are wrapped with a communication wire core insulating layer to form a communication wire core, and the twist pitch ratio is not more than 15 times; the thickness of the insulating layer of the communication wire core is 0.15-0.8 mm;
the communication wire cores and the communication wire core reinforcing wires are twisted to form a communication wire group, and the twist pitch diameter ratio is not more than 12 times; the communication wire core reinforcing wire is formed by aramid fiber bundles, and the ratio of the bundle pitch to the diameter is not more than 20 times;
the communication core wire group is wrapped with a shielding layer to form a communication core shielding wire group, the shielding layer is formed by weaving tinned copper wires, and the weaving coverage rate is not less than 75%;
the cable core reinforcing wire is formed by aramid fiber bundles, and the ratio of the bundle pitch to the diameter is not more than 20 times;
the cable core outer winding cladding layer is formed by overlapping and wrapping semi-conducting tapes, the wrapping and covering rate is not less than 15%, and the wrapping direction is opposite to the twisting direction of the cable core;
the armor layer is formed by weaving tinned copper wires, and the weaving density of the tinned copper wires is not less than 88%;
the outer sheath is made of sheath materials, and the thickness of the outer sheath is 1.5-5 mm.
2. The tensile, winding-resistant, torsion-resistant and wear-resistant composite cable of claim 1, wherein in the power conductor reinforcing wire is in an axial position, and the plurality of power conductor strands are symmetrical around the power conductor reinforcing wire;
in the power wire core, the sectional area of the conductor is 1-35 mm2；
In the power conductor compound yarn, the wire diameter of the tinned copper wire is 0.10-0.30 mm, and the wire diameter of the power conductor compound yarn is 0.2-3.0 mm.
3. The composite tensile, kink-resistant, torsion-resistant, and abrasion-resistant cable of claim 1, wherein the communication conductor strength wire is in an axial position in the communication core, and the plurality of communication conductor strands are symmetric about the communication conductor strength wire;
in the communication wire core, the cross-sectional area of the conductor is 0.35-4.0 mm2；
In the communication conductor compound yarn, the wire diameter of the tinned copper wire is 0.10-0.25 mm, and the wire diameter of the communication conductor compound yarn is 0.2-1.0 mm.
4. The tensile, winding-resistant, torsion-resistant and wear-resistant composite cable according to claim 1, wherein the power core insulating layer and the communication core insulating layer are formed by extruding crosslinked polyethylene;
the precision of power sinle silk insulating layer and communication sinle silk insulating layer does: the thickness of the thinnest part is not less than 90-0.1 mm of the nominal thickness, and the maximum thickness on any cross section is not less than 1.4 times of the minimum thickness.
5. The tensile, kink-resistant, torsion-resistant, and abrasion-resistant composite cable of claim 1, wherein the power core wire set and the communication core shield wire set are sequentially arranged adjacent to one another in the cable core, and the cable core reinforcement wire is in a gap between the power core wire set and the communication core shield wire set.
6. The composite cable of claim 1, wherein the diameter of the tin-plated copper wire in the shielding layer of the communication core shielding wire set is 0.10-0.30 mm.
7. The tensile, winding-resistant, torsion-resistant and wear-resistant composite cable according to claim 1, wherein in the armor layer, the wire diameter of the tinned copper wire is 0.15-0.30 mm.
8. The tensile, kink-resistant, torsion-resistant, abrasion-resistant composite cable of claim 1, wherein the outer jacket is comprised of a cross-linked polyolefin jacket material; the precision of the outer sheath is as follows: the average thickness is not less than the nominal thickness, the thinnest portion of the outer jacket is not less than 1.5mm, and the maximum thickness is not greater than 1.66 times the minimum thickness at any cross-section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122610105.7U CN216487404U (en) | 2021-10-28 | 2021-10-28 | Tensile, bending-resistant, twisting-resistant and wear-resistant composite cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122610105.7U CN216487404U (en) | 2021-10-28 | 2021-10-28 | Tensile, bending-resistant, twisting-resistant and wear-resistant composite cable |
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