CN103777295A - Self-supporting optical cable with marking strips - Google Patents
Self-supporting optical cable with marking strips Download PDFInfo
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- CN103777295A CN103777295A CN201410036276.5A CN201410036276A CN103777295A CN 103777295 A CN103777295 A CN 103777295A CN 201410036276 A CN201410036276 A CN 201410036276A CN 103777295 A CN103777295 A CN 103777295A
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Abstract
The invention relates to the technical field of cables, in particular to a self-supporting optical cable with marking strips. The self-supporting optical cable with the marking strips is formed by a cable core, an outer protecting sleeve wrapping the cable core, a strengthening element, a suspension wire protecting layer wrapping the strengthening element and a rib enabling the suspension wire protecting layer and the outer protecting sleeve to be connected. The cable core is formed by a central strengthening piece located in the center, a plurality of loose sleeve pipes located outside the central strengthening piece and a protecting layer. Optical fibers are arranged in the loose sleeve pipes. The self-supporting optical cable with the marking strips is characterized in that the strengthening element is made of a steel wire or glass fiber strengthening plastic, the two marking strips are symmetrically arranged on the suspension wire protecting layer, and the suspension wire protecting layer, the outer protecting sleeve and the rib are formed integrally and are made of identical materials. The invention further discloses the components and proportions of the marking strips. The self-supporting optical cable with the marking strips has the advantages that the thickness of the suspension wire protecting layer is more convenient to control, more smooth and round, products can be produced faster and are higher in qualified rate, the optical fibers are lower in self-weight and longer in adaptive span, and the color of the marking strips is more stable.
Description
Technical field
The present invention relates to technical field of cables, especially relate to the self-support cable with identification strip.
Background technology
Self-support cable is most of to be laid for built on stilts, due to the load function admirable of himself, just can realize laying of cable therefore do not need extra steel strand wires to support, normally that cable is fixing on the fixture at shaft tower place, and be freely to place between adjacent shaft tower.But along with the develop rapidly of communication industry, the number of cables between shaft tower sharply increases, owing to being not easy to distinguish, therefore bring great trouble to maintenance.For this reason, carry out a large amount of research both at home and abroad, notification number is CN202196211U, name is called the 8-shaped self-support aerial cable of surface band vitta, comprise optical cable core and oversheath, in having in cable core, establish the loose sleeve pipe of optical fiber and fine cream, central reinforce member, a side at oversheath is provided with the supporting part being made up of steel wire and sheath thereof, between oversheath and steel wire sheath, being provided with suspender belt is connected, the xsect of cable is 8-shaped, be provided with one or several vitta at oversheath and steel wire jacket surface, it can distinguish different optical cables according to the color of its surperficial vitta and quantity, facilitate the maintenance of optical cable, guarantee the normal use of optical cable.Notification number is that the optical cable that CN202256824U, name are called tape identification comprises sheath and is coated on the optical fiber extending in the same way with sheath in described sheath, the surface of sheath is formed with mark vitta along its bearing of trend, can very easily in numerous optical cables, find required optical cable by mark vitta, easy to identify, be convenient to repairing, safeguard; And two or more mark vitta combinations and width, thickness and the position relationship each other of vitta can be identified optical cable, can identify more optical cable.Above-mentioned document discloses the identification strip of optical cable identification really, but, there is following common defect: (1) adopts stranded steel wire to realize self-supporting as the reinforcement of messenger wire part, although reached the function of larger holding capacity, but, sheath outside stranded steel wire is extremely rough, and the sheath performance of optical cable is extremely undesirable; Accomplish the smooth thickness that must greatly increase sheath, increased like this weight and the cost of optical cable, the span of optical cable is shortened.(2) certificate is in the defect of above-mentioned (1), and the thickness of the identification strip on messenger wire sheath is restive, and therefore the quality of product is extremely unstable, and speed of production is quite slow.In addition, the unsettled phenomenon of identification strip ubiquity color of the prior art, in south east asia, optical cable built on stilts lay 1 year after, there is to some extent the phenomenon that identification strip fades, affected the accurate use of mark.
Summary of the invention
For addressing the above problem, the present invention discloses a kind of self-support cable with identification strip, it can make optical cable appearance more width and the thickness of smooth, the identification strip of rounding can be controlled more accurately, in optical cable from the material consumption of load reinforcement messenger wire sheath still less, the outside dimension speed of production less, optical cable of optical cable is faster, identification strip is more stable; It is realized by the following technical solutions.
Have the self-support cable of identification strip, it is to be made up of the muscle 7 of cable core, the oversheath 6 that envelopes cable core, enhancing element 8, the messenger wire sheath 9 that envelopes enhancing element, connection messenger wire sheath and oversheath; Cable core by being positioned at central central reinforce member 1, be positioned at many loose sleeve pipes 2 outside central reinforce member, the protective seam 5 that envelopes many loose sleeve pipes forms; In pine sleeve pipe, there is at least one light transmitting fiber 4; It is characterized in that: strengthen element be individual wire or glass fiber reinforced plastics, on messenger wire sheath, be provided with symmetrically two identification strips 10, messenger wire sheath, oversheath, muscle be integrally formed and be identical material.
The self-support cable with identification strip described above, is characterized in that in described cable core, and many pine covers are stranded around central reinforce member; Stranded mode is that spiral is stranded or forward and reverse stranded.
Have the self-support cable of identification strip, it is to be made up of the muscle 7 of cable core, the oversheath 6 that envelopes cable core, enhancing element 8, the messenger wire sheath 9 that envelopes enhancing element, connection messenger wire sheath and oversheath; Cable core by central central reinforce member 1, be positioned at least one gasket for packing 3 outside central reinforce member and many loose sleeve pipes 2, the protective seam 5 that envelopes gasket for packing and loose sleeve pipe forms; In pine sleeve pipe, there is at least one light transmitting fiber 4; It is characterized in that: strengthen element be individual wire or glass fiber reinforced plastics, on messenger wire sheath, be provided with symmetrically two identification strips 10, messenger wire sheath, oversheath, muscle be integrally formed and be identical material.
The self-support cable with identification strip described above, is characterized in that in described cable core, and gasket for packing and many pine covers are stranded around central reinforce member; Stranded mode is that spiral is stranded or forward and reverse stranded.
The self-support cable with identification strip described above, the thickness that it is characterized in that described identification strip is 0.2mm～1.0mm.
The self-support cable with identification strip described above, is characterized in that on described oversheath, having mark band 11.
The self-support cable with identification strip described above, the thickness that it is characterized in that described mark band is 0.2mm～1.0mm.
The self-support cable with identification strip described above, is characterized in that described enhancing element is phosphatization steel wire or zinc-coated wire.
The self-support cable with identification strip described above, the material that it is characterized in that described oversheath is Low Density Polyethylene or medium density polyethylene or high density polyethylene or low-smoke non-halogen flame-retardant tygon.
The self-support cable with identification strip described above, the material that it is characterized in that described central reinforce member is steel wire or glass fiber reinforced plastics.
The self-support cable with identification strip described above, the material that it is characterized in that described gasket for packing is polypropylene or tygon.
The self-support cable with identification strip described above, the material that it is characterized in that described loose sleeve pipe is polybutylene terephthalate or modified polypropene.
The self-support cable with identification strip described above, is characterized in that described light transmitting fiber is single-mode fiber or multimode optical fiber.
The self-support cable with identification strip described above, the material that it is characterized in that described protective seam is waterstop or nonwoven fabrics or glass fiber reinforced plastics band or aluminium-plastic tape or composite steel-plastic belt or stainless steel band.
The self-support cable with identification strip described above, is characterized in that along the direction of oversheath extension, and described muscle is interrupted distribution.
The self-support cable with identification strip described above, is characterized in that described identification strip is to be made up of the raw material of following weight portion: 0.3～0.8 part of antioxidant, 1.7～3 parts of native paraffins that material 90～95 part, commercial polyethylene color masterbatch 2～3 part, the titanium dioxide 6～8 part identical with oversheath, commercially available model are 1010.
The self-support cable with identification strip described above, is characterized in that described mark band can be the starting material identical with identification strip.
In the present invention, owing to having adopted non-stranded single enhancing element, therefore, the messenger wire sheath of optical cable is doing yesterday thinner in the situation that, and messenger wire sheath can also be accomplished smooth rounding; THICKNESS CONTROL is more convenient, product qualified rate is high and speed of production is fast; Because the wall thickness of messenger wire sheath can be relatively thin, therefore, the material consumption of messenger wire sheath can reduce effectively, therefore can effectively reduce the deadweight of optical cable, can effectively increase the span of fiber cable laying.Because identification strip and/or mark band have adopted special formula, therefore, the moulding of identification strip is more convenient, and color stability is higher.
Therefore, the present invention has following main beneficial effect: messenger wire sheath THICKNESS CONTROL is more convenient, the more smooth rounding of messenger wire sheath, production speed are faster, qualification rate is higher; Lighter, the applicable span of optical cable deadweight is longer, and the color of identification strip is more stable.
Accompanying drawing explanation
Fig. 1 is the perspective view of the invention process example 1.
Fig. 2 is the cross-sectional structure schematic diagram of this Fig. 1.
Fig. 3 is the perspective view of the invention process example 2.
Fig. 4 is the cross-sectional structure schematic diagram of this Fig. 3.
Fig. 5 is the cross-sectional structure schematic diagram of the invention process example 3.
Fig. 6 is the cross-sectional structure schematic diagram of the invention process example 4.
Embodiment
In order to make field, place personnel understand more fully the present invention, the concrete embodiment of existing combination is described in more detail, and name corresponding to each mark in figure is called: 1-central reinforce member; 2-loose sleeve pipe; 3-gasket for packing, 4-light transmitting fiber, 5-protective seam; 6-oversheath; 7-muscle, 8-enhancing element, 9-messenger wire sheath; 10-identification strip, 11-mark band.
Ask for an interview Fig. 1 and Fig. 2, have the self-support cable of identification strip, it is to be made up of the muscle 7 of cable core, the oversheath 6 that envelopes cable core, enhancing element 8, the messenger wire sheath 9 that envelopes enhancing element, connection messenger wire sheath and oversheath; Cable core by central central reinforce member 1, be positioned at gasket for packing 3 outside central reinforce member and two loose sleeve pipes 2, the protective seam 5 that envelopes gasket for packing and loose sleeve pipe forms; In every loose sleeve pipe, there is six roots of sensation light transmitting fiber 4; It is characterized in that: strengthen element be single phosphatization steel wire, on messenger wire sheath, be provided with symmetrically two identification strips 10, messenger wire sheath, oversheath, muscle be integrally formed and be identical material; Gasket for packing and many pine covers are stranded around central reinforce member; The thickness of identification strip is 0.5mm; The material of oversheath is medium density polyethylene; The material of central reinforce member is steel wire; The material of gasket for packing is polypropylene; The material of pine sleeve pipe is polybutylene terephthalate; Light transmitting fiber is single-mode fiber; The material of protective seam is waterstop; Identification strip is to be made up of the raw material of following weight portion: 0.3 part of antioxidant, 1.7 parts of native paraffins that material 90 part, commercial polyethylene color masterbatch 2 part, the titanium dioxide 6 part identical with oversheath, commercially available model are 1010.
Ask for an interview Fig. 3 and Fig. 4, and with reference to figure 1 and Fig. 2, have the self-support cable of identification strip, with embodiment 1, difference is substantially: gasket for packing 2 has three, and loose sleeve pipe 3 has two; Identification strip is to be made up of the raw material of following weight portion: 0.8 part of antioxidant, 3 parts of native paraffins that material 95 part, commercial polyethylene color masterbatch 3 part, the titanium dioxide 8 part identical with oversheath, commercially available model are 1010.
Ask for an interview Fig. 5, and with reference to figure 3 and Fig. 4, have the self-support cable of identification strip, with embodiment 2, difference is substantially: gasket for packing 2 has two, and loose sleeve pipe 3 has three; Identification strip is to be made up of the raw material of following weight portion: 0.6 part of antioxidant, 2 parts of native paraffins that material 93 part, commercial polyethylene color masterbatch 1.5 part, the titanium dioxide 7 part identical with oversheath, commercially available model are 1010.
Ask for an interview Fig. 6, and with reference to figure 3 to Fig. 5, there is the self-support cable of identification strip, with embodiment 2, difference is substantially: on described oversheath, there is mark band 11, mark band be positioned at oversheath under; Mark band and identification strip are identical materials.
Certainly, the self-support cable with identification strip described in above-mentioned arbitrary embodiment, it can also be to be made up of the muscle 7 of cable core, the oversheath 6 that envelopes cable core, enhancing element 8, the messenger wire sheath 9 that envelopes enhancing element, connection messenger wire sheath and oversheath; Cable core by being positioned at central central reinforce member 1, be positioned at many loose sleeve pipes 2 outside central reinforce member, the protective seam 5 that envelopes many loose sleeve pipes forms; In pine sleeve pipe, there is at least one light transmitting fiber 4; It is characterized in that: strengthen element be individual wire or glass fiber reinforced plastics, on messenger wire sheath, be provided with symmetrically two identification strips 10, messenger wire sheath, oversheath, muscle be integrally formed and be identical material.
Certainly, further, the self-support cable with identification strip described above, is characterized in that in described cable core, and many pine covers are stranded around central reinforce member; Stranded mode is that spiral is stranded or forward and reverse stranded.
Certainly, the self-support cable with identification strip described in above-mentioned arbitrary embodiment, it is to be made up of the muscle 7 of cable core, the oversheath 6 that envelopes cable core, enhancing element 8, the messenger wire sheath 9 that envelopes enhancing element, connection messenger wire sheath and oversheath; Cable core by central central reinforce member 1, be positioned at least one gasket for packing 3 outside central reinforce member and many loose sleeve pipes 2, the protective seam 5 that envelopes gasket for packing and loose sleeve pipe forms; In pine sleeve pipe, there is at least one light transmitting fiber 4; It is characterized in that: strengthen element be individual wire or glass fiber reinforced plastics, on messenger wire sheath, be provided with symmetrically two identification strips 10, messenger wire sheath, oversheath, muscle be integrally formed and be identical material.
Certainly, the self-support cable with identification strip described in above-mentioned arbitrary embodiment, is characterized in that in described cable core, and gasket for packing and many pine covers are stranded around central reinforce member; Stranded mode is that spiral is stranded or forward and reverse stranded.
Certainly, the self-support cable with identification strip described in above-mentioned arbitrary embodiment, the thickness that it is characterized in that described identification strip is 0.2mm～1.0mm.
Certainly, the self-support cable with identification strip described in above-mentioned arbitrary embodiment, is characterized in that on described oversheath, all having mark band 11, and mark band position is as long as on oversheath, and the number of mark band is not limited to one.
Certainly, the self-support cable with identification strip described in above-mentioned arbitrary embodiment, the thickness that it is characterized in that described mark band is 0.2mm～1.0mm.
Certainly, the self-support cable with identification strip described in above-mentioned arbitrary embodiment, is characterized in that described enhancing element is phosphatization steel wire or zinc-coated wire.
Certainly, the self-support cable with identification strip described in above-mentioned arbitrary embodiment, the material that it is characterized in that described oversheath is Low Density Polyethylene or medium density polyethylene or high density polyethylene or low-smoke non-halogen flame-retardant tygon.
Certainly, the self-support cable with identification strip described in above-mentioned arbitrary embodiment, the material that it is characterized in that described central reinforce member is steel wire or glass fiber reinforced plastics.
Certainly, the self-support cable with identification strip described in above-mentioned embodiment 2-embodiment 4, the material that it is characterized in that described gasket for packing is polypropylene or tygon.
Certainly, the self-support cable with identification strip described in above-mentioned arbitrary embodiment, the material that it is characterized in that described loose sleeve pipe is polybutylene terephthalate or modified polypropene.
Certainly, the self-support cable with identification strip described in above-mentioned arbitrary embodiment, is characterized in that described light transmitting fiber is single-mode fiber or multimode optical fiber.
Certainly, the self-support cable with identification strip described in above-mentioned arbitrary embodiment, the material that it is characterized in that described protective seam is waterstop or nonwoven fabrics or glass fiber reinforced plastics band or aluminium-plastic tape or composite steel-plastic belt or stainless steel band.
Certainly, the self-support cable with identification strip described in above-mentioned arbitrary embodiment, is characterized in that along the direction of oversheath extension, and described muscle is interrupted distribution; The interrupted consumption that distributes and saved material on the one hand of muscle, has reduced the deadweight of optical cable on the other hand; Make on the one hand optical cable occurring that when bad, messenger wire is more easily peeled off again, make oversheath and cable core and be repeated to utilize, and when muscle continuous distribution, optical cable is in the time occurring bad order, messenger wire is difficult to peel off, and oversheath and cable core are difficult to be repeated utilize.
Certainly, the self-support cable with identification strip described in above-mentioned arbitrary embodiment, is characterized in that described identification strip is to be made up of the raw material of following weight portion: 0.3～0.8 part of antioxidant, 1.7～3 parts of native paraffins that material 90～95 part, commercial polyethylene color masterbatch 2～3 part, the titanium dioxide 6～8 part identical with oversheath, commercially available model are 1010.
Applicant has carried out contrast test for embodiment 1 to embodiment 4 and the optical cable with identification strip of the prior art, and test findings is as follows.
| Pilot project | Prior | Embodiment | 1 | |
|
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| By the salt-fog test of GB5589.5 requirement | Do not pass through | Pass through | Pass through | Pass through | Pass through | |
| 100% humidity, 50 ℃ | After 163 days, start to fade, within 245 days, become white | After 1120 days, start to fade, within 1292 days, become white | After 1218 days, start to fade, within 1340 days, become white | Within 1520 days, have no and fade | Within 1520 days, have no and fade | |
| By GB/T2951.2, optical cable is carried out to heat ageing | Do not pass through | Pass through | Pass through | Pass through | Pass through |
Can obviously find out from upper table, adopt identification strip and/or the mark band of the present invention's formula to there is good colour stability and salt fog resistance and heat aging property.
Certainly, the self-support cable with identification strip described in above-mentioned arbitrary embodiment, is characterized in that described mark band can be the starting material identical with identification strip.
The invention process example 1 is to embodiment 4, and speed of production has all reached 80 ms/min, does not occur the phenomenon of bad order; And in prior art, the speed of producing this optical cable is less than 25 ms/min and bad order rate and is greater than 18%; Compared with prior art, because the core of optical cable is counted difference, therefore the external diameter of optical cable is also different, and with comparing of core number, the overall height of optical cable has reduced by 15%-30%, the overall weight of optical cable has alleviated 11%-18%.
In the present invention, owing to having adopted non-stranded single enhancing element, therefore, the messenger wire sheath of optical cable is doing yesterday thinner in the situation that, and messenger wire sheath can also be accomplished smooth rounding; THICKNESS CONTROL is more convenient, product qualified rate is high and speed of production is fast; Because the wall thickness of messenger wire sheath can be relatively thin, therefore, the material consumption of messenger wire sheath can reduce effectively, therefore can effectively reduce the deadweight of optical cable, can effectively increase the span of fiber cable laying.Because identification strip and/or mark band have adopted special formula, therefore, the moulding of identification strip is more convenient, and color stability is higher.
Therefore, the present invention has following main beneficial effect: messenger wire sheath THICKNESS CONTROL is more convenient, the more smooth rounding of messenger wire sheath, production speed are faster, qualification rate is higher; Lighter, the applicable span of optical cable deadweight is longer, and the color of identification strip is more stable.
The present invention is not limited to above-mentioned preferred forms, should be appreciated that design of the present invention can be by other various forms enforcement utilizations, and they drop in protection scope of the present invention equally.
Claims (10)
1. the self-support cable with identification strip, is characterized in that: the enhancing element of comprise cable core, envelope the oversheath of cable core, being made up of individual wire or glass fiber reinforced plastics, the muscle that envelopes the messenger wire sheath, connection messenger wire sheath and the oversheath that strengthen element; Described cable core by being positioned at central central reinforce member, be positioned at many loose sleeve pipes outside central reinforce member, the protective seam that envelopes many loose sleeve pipes forms; In pine sleeve pipe, there is at least one light transmitting fiber; On messenger wire sheath, be provided with symmetrically two identification strips, the messenger wire sheath of described same material, oversheath, muscle are integrally formed.
2. the self-support cable with identification strip according to claim 1, is characterized in that in described cable core, and many pine covers are stranded around central reinforce member; Stranded mode is that spiral is stranded or forward and reverse stranded.
3. the self-support cable with identification strip according to claim 1, is characterized in that: described cable core by central central reinforce member, be positioned at least one gasket for packing outside central reinforce member and many loose sleeve pipes, the protective seam that envelopes gasket for packing and loose sleeve pipe forms.
4. the self-support cable with identification strip according to claim 3, is characterized in that in described cable core, and gasket for packing and many pine covers are stranded around central reinforce member; Stranded mode is that spiral is stranded or forward and reverse stranded.
5. according to the self-support cable with identification strip described in claim 1 to 4 any one, it is characterized in that thering is mark band on described oversheath.
6. according to the self-support cable with identification strip described in claim 1 to 4 any one, the thickness that it is characterized in that described identification strip is 0.2mm～1.0mm.
7. the self-support cable with identification strip according to claim 5, the thickness that it is characterized in that described mark band is 0.2mm～1.0mm.
8. according to the self-support cable with identification strip described in claim 1 to 4 any one, it is characterized in that described enhancing element is phosphatization steel wire or zinc-coated wire; The material of described central reinforce member is steel wire or glass fiber reinforced plastics.
9. according to the self-support cable with identification strip described in claim 1 to 4 any one, the material that it is characterized in that described oversheath is Low Density Polyethylene or medium density polyethylene or high density polyethylene or low-smoke non-halogen flame-retardant tygon; The material of described loose sleeve pipe is polybutylene terephthalate or modified polypropene; Described light transmitting fiber is single-mode fiber or multimode optical fiber; The material of described protective seam is waterstop or nonwoven fabrics or glass fiber reinforced plastics band or aluminium-plastic tape or composite steel-plastic belt or stainless steel band.
10. according to the self-support cable with identification strip described in claim 1 to 4 any one, it is characterized in that along the direction of oversheath extension, described muscle is interrupted distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410036276.5A CN103777295B (en) | 2014-01-26 | 2014-01-26 | There is the self-support cable of identification strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410036276.5A CN103777295B (en) | 2014-01-26 | 2014-01-26 | There is the self-support cable of identification strip |
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| CN201610259909.8A Division CN105700097A (en) | 2014-01-26 | 2014-01-26 | Optical cable capable of being identified at night |
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| CN201610259844.7A Division CN105676390A (en) | 2014-01-26 | 2014-01-26 | Communication cable capable of being identified under weak light condition |
| CN201610259914.9A Division CN105676396A (en) | 2014-01-26 | 2014-01-26 | Self-bearing type optical cable for electric tower |
| CN201610259913.4A Division CN105676395A (en) | 2014-01-26 | 2014-01-26 | Self-bearing type optical cable for power grid or communication network |
| CN201610259908.3A Division CN105717596A (en) | 2014-01-26 | 2014-01-26 | Self-supporting aerial optical cable capable of being identified through night vision |
| CN201610259876.7A Division CN105700094A (en) | 2014-01-26 | 2014-01-26 | Aerial structure optical cable |
| CN201610259902.6A Division CN105717594A (en) | 2014-01-26 | 2014-01-26 | Self-supporting communication optical cable easy to identify |
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| CN103777295A true CN103777295A (en) | 2014-05-07 |
| CN103777295B CN103777295B (en) | 2016-05-25 |
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| CN201410036276.5A Active CN103777295B (en) | 2014-01-26 | 2014-01-26 | There is the self-support cable of identification strip |
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| CN104062727A (en) * | 2014-06-23 | 2014-09-24 | 江苏亨通光电股份有限公司 | Light small-cable-diameter 8-shaped self-supporting optical cable |
| CN104599768A (en) * | 2014-08-27 | 2015-05-06 | 沈群华 | Luminous cable |
| CN105655039A (en) * | 2014-08-27 | 2016-06-08 | 沈群华 | Light-emitting type cable |
| CN105676393A (en) * | 2014-01-26 | 2016-06-15 | 王和根 | Salt-fog-resistant optical cable for electric tower |
| CN105702348A (en) * | 2014-08-27 | 2016-06-22 | 沈群华 | Light-emitting cable |
| CN105869738A (en) * | 2014-08-27 | 2016-08-17 | 沈群华 | Light-emitting cable for power |
| CN108345077A (en) * | 2018-05-08 | 2018-07-31 | 苏州暖人心热水器电子科技有限公司 | A kind of nonmetallic self-support cable |
| CN113721334A (en) * | 2021-08-30 | 2021-11-30 | 深圳市特发信息光网科技股份有限公司 | Leading-in optical cable, manufacturing mold thereof, manufacturing method thereof and air tightness testing method |
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| CN113721334A (en) * | 2021-08-30 | 2021-11-30 | 深圳市特发信息光网科技股份有限公司 | Leading-in optical cable, manufacturing mold thereof, manufacturing method thereof and air tightness testing method |
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