CN101335114A - Copper coated aluminum dual-core flame-retardant refractory flexible electric cable and manufacturing method thereof - Google Patents
Copper coated aluminum dual-core flame-retardant refractory flexible electric cable and manufacturing method thereof Download PDFInfo
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- CN101335114A CN101335114A CNA2008101353128A CN200810135312A CN101335114A CN 101335114 A CN101335114 A CN 101335114A CN A2008101353128 A CNA2008101353128 A CN A2008101353128A CN 200810135312 A CN200810135312 A CN 200810135312A CN 101335114 A CN101335114 A CN 101335114A
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Abstract
The invention discloses a copper-clad aluminum two-core flame retardant and fire resisting flexible cable and a manufacturing method thereof. The method comprises the steps that: a copper-clad aluminum conductor is made into a single conductive wire core; the single conductive wire core is processed into a conductive wire core provided with a semi-round section; a wire core fire resisting layer is formed on the outer surface of the conductive wire core provided with a semi-round section; an insulation material is extruded on the wire core fire resisting layer, and an insulation process for forming an insulation wire core provided with an insulation layer is carried out; a cable-froming process is carried out to two insulation wire cores provided with insulation layers, thereby forming a cable yarn; flame retardant plastic is extruded on the cable yarn so as to form a flame retardant restrictive coating. The cable of the invention has the advantages of low copper consumption, light weight and low cost.
Description
Technical field
The present invention relates to the electric wire technology, particularly copper coated aluminum dual-core flame-retardant refractory flexible electric cable and manufacture method thereof.
Background technology
Notion for copper cover aluminum, electric wire production firm is not strange, that is exactly the aluminium that the structure that will constitute each conductive monofilament of conductor wire core is processed into outer field copper and internal layer, can save the copper that belongs to strategic resource in large quantities like this, can make the maximum function of copper performance again.For example being no lack of before in the Chinese patent literature at document has report, for example: Chinese patent Granted publication CN2881898 introduce the copper cover aluminum city communication cable, the disclosed copper cover aluminum communication cable of CN2881899, the copper clad aluminum conductor communication cable that CN200979818Y recommends, the copper clad aluminum conductor that CN101060024A is public all or the electric wire of copper covered steel conductor, the bimetallic conductor monitoring type earth cable that CN2829026Y discloses, a kind of high strength copper-coated aluminum electric wire/cable that CN2906844Y discloses, also just like CN1758384Y, CN201004349Y, CN2919466Y, CN101086906Y, CN200986831Y, CN2348466Y, CN2904222Y, CN200976298Y, CN200969249Y, CN2891231Y, CN2879357Y or the like has all related to aluminium conductor has been coated copper clad outward, and purpose all is in order to save the copper resource.
Yet, because the aluminium pulling force is little, intensity is low, or copper cladding aluminum conductor that copper consumption little little for diameter, the easily broken and difficulty of processing of its copper cover aluminum lead enlarges markedly, even can't process at all.And if dilated diameter or increase copper consumption then can make cable harden, be unfavorable for laying.
Summary of the invention
The purpose of this invention is to provide a kind of flexibility excellent and help laying, handling ease and copper coated aluminum dual-core flame-retardant refractory flexible electric cable and manufacture method thereof safe in utilization.
According to a first aspect of the invention, copper coated aluminum dual-core flame-retardant refractory flexible electric cable manufacture method provided by the invention comprises:
Copper-clad aluminum conductor is made the step of single conductor wire core;
Form the step of core flame retardant coating at described single conductor wire core outer surface;
Insulating material is extruded on the described core flame retardant coating, forms the insulation processing step of insulated wire cores with insulating barrier;
Two insulated wire cores with described insulating barrier are carried out the stranding processing, form the step of cable; And
On described cable, extrude plastic refractory to form the step of flame retardant sheath layer.
The step that above-mentioned stranding is handled comprises:
It is stranded to utilize cabler that two eradication edge cores are carried out, and forms wire harness;
On described wire harness, wrap up in bag cable flame retardant coating, to form cable; And
Between cable flame retardant coating and two insulating barriers, fill filler.
According to second aspect present invention, the semicircle flame-retardant refractory flexible electric cable manufacture method of copper coated aluminum dual-core provided by the invention comprises:
Copper-clad aluminum conductor is made the step of single conductor wire core;
Single conductor wire core is processed into the step that cross section is semicircular conductor wire core;
At described cross section is the step that semicircular conductor wire core outer surface forms the core flame retardant coating;
Insulating material is extruded on the described core flame retardant coating, forms the insulation processing step of insulated wire cores with insulating barrier;
Two insulated wire cores with described insulating barrier are carried out the stranding processing, form the step of cable; And
On described cable, extrude flame retardant plastics to form the step of flame retardant sheath layer.
The step that wherein said stranding is handled comprises:
Utilize cabler that two its cross sections are respectively semicircular insulated wire cores and carry out strandedly, form wire harness; And
Wrapped cable flame retardant coating on described wire harness is to form cable.
Wherein the step at single conductor wire core outer surface formation flame retardant coating comprises:
At the described single conductor wire core outer surface mica layer that is wrapped; And
At the wrapped glass layer of the outer surface of described mica layer.
In above-mentioned two kinds of methods, the step of copper-clad aluminum conductor being made single conductor wire core comprises:
Utilize wire drawing machine that copper-clad aluminum conductor is drawn into single conductive monofilament;
Utilize the annealing machine that described single conductive monofilament is carried out annealing in process;
Utilize the synnema machine with several conductive monofilament Shu Hecheng strands of having annealed;
Utilize stranding machine that several described strands are twisted into conductor wire core.
Wherein, the described drawing angle that copper-clad aluminum conductor is drawn into single conductive monofilament is 12 °～14 °; Annealing temperature in the described annealing in process is controlled at 540 ± 10 ℃.
According to third aspect present invention, copper coated aluminum dual-core flame-retardant refractory flexible electric cable provided by the invention comprises:
Conductor wire core with insulating barrier, the cross section of this conductor wire core are circular;
The cable flame retardant coating is wrapped up in the stranded two described cables that have the conductor wire core 1 of insulating barrier and form of bag; And
Be extruded in the flame retardant sheath layer on the described cable flame retardant coating; Wherein:
Conductor wire core constitutes by the multiply conductive monofilament is stranded;
Every conductive monofilament is made of the aluminium conductor copper clad outer with being coated on aluminium conductor.
According to a forth aspect of the invention, copper coated aluminum dual-core flame-retardant refractory flexible electric cable provided by the invention comprises:
Conductor wire core with insulating barrier, the cross section of this conductor wire core are semicircle;
The cable flame retardant coating is wrapped up in the stranded two described cables that have the conductor wire core of insulating barrier and form of bag; And
Be extruded in the flame retardant sheath layer on the described cable flame retardant coating; Wherein:
Conductor wire core constitutes by the multiply conductive monofilament is stranded;
Every conductive monofilament is made of the aluminium conductor copper clad outer with being coated on aluminium conductor.
In copper coated aluminum dual-core flame-retardant refractory flexible electric cable of the present invention, the diameter of conductive monofilament is 0.2～1.2mm, and the diameter of aluminium conductor is 0.18439～1.10635mm, and the thickness of copper clad is 0.007805～0.04685mm.
Wherein, insulating barrier 4 can be with flame-proof polyvinyl chloride or low-smoke halogen-free polyolefin insulated with material layer; Cable flame retardant coating 5 can be a glass layer; Flame retardant sheath layer 6 can be flame-proof polyvinyl chloride or low-smoke halogen-free polyolefin material guards layer.
The present invention has following technique effect: few, in light weight with copper, cost is low.Because adopt the monofilament structure of many radicals, minor diameter, and strands technology, the cable particularly soft can be done any bending.
The present invention is described in detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the schematic diagram that shows the circular flame-retardant refractory flexible electric cable structure of copper coated aluminum dual-core of the present invention;
Fig. 2 is the schematic diagram that shows the semicircle flame-retardant refractory flexible electric cable structure of copper coated aluminum dual-core of the present invention;
Fig. 3 is the schematic diagram that shows conductive monofilament 11 structures of the present invention.
Embodiment
For the circular flame-retardant refractory flexible electric cable of copper coated aluminum dual-core of the present invention shown in Figure 1, the method for making cable comprises: the step of copper-clad aluminum conductor being made single conductor wire core 1; Form the step of core flame retardant coating (2,3) at described single conductor wire core 1 outer surface; Insulating material is extruded on the described core flame retardant coating (2,3), forms the insulation processing step of insulated wire cores with insulating barrier 4; Two insulated wire cores with described insulating barrier 4 are carried out the stranding processing, form the step of cable; And on described cable, extrude plastic refractory to form the step of flame retardant sheath layer 6.Because when making single conductor wire core 1, it is circular that the cross section of made single conductor wire core 1 is generally, and do not need usually that therefore conductor wire core 1 is processed into cross section and be circular conductor wire core 1; If but the cross section of the single conductor wire core of making 1 needs that then conductor wire core 1 is processed into its cross section and is circular conductor wire core not for circular.
The above-mentioned step that forms core flame retardant coating (2,3) at single conductor wire core 1 outer surface comprises: at the described single conductor wire core 1 outer surface mica layer (band) 2 that is wrapped; And at the wrapped glass layer of the outer surface of described mica layer 2 (band) 3.
The step that stranding is handled comprises: it is stranded to utilize cabler that two eradication edge cores are carried out, and forms wire harness; On described wire harness, form cable flame retardant coating (as wrapped glass fiber tape) 5 then, form cable.
Because conductor wire core 1 shown in Figure 1 is circular core, behind two eradication edge core strandings, among the cable sizable space will appear therefore, and this will reduce the intensity of cable.For this reason, stranding treatment step of the present invention also is included between cable flame retardant coating 5 and two insulating barriers 4 and fills filler 7.A kind of concrete grammar of implementing to fill for example can be: before wrapped cable flame retardant coating 5, wrap up wire harness with gasket for packing earlier to wire harness, and then wrapped cable flame retardant coating 5.Can certainly adopt alternate manner to fill.
For the semicircle flame-retardant refractory flexible electric cable of copper coated aluminum dual-core of the present invention shown in Figure 2, the method for making this flexible cable comprises: the step of copper-clad aluminum conductor being made single conductor wire core 1; Single conductor wire core is processed into the step that cross section is semicircular conductor wire core (1); At described cross section is the step that semicircular conductor wire core 1 outer surface forms core flame retardant coating (2,3); Insulating material is extruded on the described core flame retardant coating (2,3), forms the insulation processing step of insulated wire cores with insulating barrier 4; Two insulated wire cores with described insulating barrier 4 are carried out the stranding processing, form the step of cable; And on described cable, extrude flame retardant plastics to form the step of flame retardant sheath layer 6.
The above-mentioned step that forms flame retardant coating (2,3) at single conductor wire core 1 outer surface comprises: at the described single conductor wire core 1 outer surface mica layer (band) 2 that is wrapped; And at the wrapped glass layer of the outer surface of described mica layer 2 (band) 3.
The step that stranding is handled comprises: utilize cabler that two its cross sections are respectively semicircular insulated wire cores and carry out strandedly, form wire harness; Wrapped cable flame retardant coating (as wrapped glass fiber tape) 5 on described wire harness forms cable then.
Because it is semicircular conductor wire core that the cable behind the stranding comprises the cross section of two amalgamations, therefore be full of substantially in the cable, the cross section that is cable is (solid) circle, resistance to compression, the buckling strength of cable have so not only been increased, but also having increased the surface area (thereby can reduce the signal of communication loss) of conductor wire core, this has created advantage for the external diameter that significantly reduces cable.That is to say that under the constant condition of conductor wire core surface area, compare for the cable of circular conductor wire core with cross section, cross section is that the external diameter of the cable of semicircular conductor wire core is significantly reduced.
In above-mentioned two kinds of manufacture methods, insulating barrier 4 can be that flame-proof polyvinyl chloride or low-smoke halogen-free polyolefin material are extruded in the insulating barrier that forms on the glass layer 3 in addition; Cable flame retardant coating 5 can be to wrap up in to be bundled into the flame retardant coating that cable glass layer 5 forms on wire harness; Flame retardant sheath layer 6 can be that flame-proof polyvinyl chloride or low-smoke halogen-free polyolefin material are extruded in the restrictive coating that forms on the cable flame retardant coating 5.
The step that copper-clad aluminum conductor is made single conductor wire core 1 of the present invention comprises: utilize wire drawing machine that copper-clad aluminum conductor is drawn into single conductive monofilament 11; Utilize the annealing machine that described single conductive monofilament 11 is carried out annealing in process; Utilize the synnema machine with several conductive monofilament Shu Hecheng strands of having annealed; Utilize stranding machine that several described strands are twisted into conductor wire core 1.
The present invention also can save above-mentioned step with conductive monofilament Shu Hecheng strand, the step of making single conductor wire core 1 is improved to: utilize wire drawing machine that copper-clad aluminum conductor is drawn into single conductive monofilament 11; Utilize the annealing machine that described single conductive monofilament 11 is carried out annealing in process; Utilize stranding machine that many conductive monofilaments of having annealed are twisted into conductor wire core 1 then.
It is one of characteristics of the present invention that several strands of conductive monofilaments 11 are twisted together formation conductor wire core 1, and this will make the cable particularly soft, can do any bending.
Copper-clad aluminum conductor is being drawn in the process of single conductive monofilament 11, it draws angle should elect 12 °～14 ° as, to guarantee to draw the conductive monofilament success.
Because monofilament is crystal displacement hardening after drawing, so the recovery of must annealing, the key of annealing in process is the control of annealing temperature, and the annealing temperature of fine copper is about 650 ℃, and annealing temperature of the present invention should be controlled at 540 ± 10 ℃.
In the processing procedure of Shu Hecheng strand, many conductive monofilaments of having annealed can be restrainted by certain pitch and close, and pitch is not more than 14 times of bundle back strand external diameter; Monofilament can weld but the intensity of weld is not less than 85% of initial value.
In that described strand is twisted in the process of conductor wire core 1 several, described several strands can be undertaken stranded by certain pitch.
Because conductor wire core of the present invention is to adopt minor diameter, many radicals, the stranded structure of multi cord, so conductor wire core itself is very soft, and the intensity of copper-clad aluminium wire is originally just little, and this brings very big difficulty to making abnormity.
For this reason, it is stranded that the present invention adopts elder generation by the arrangement of circle strand to be carried out, and forming cross section is circular conductor wire core 1, uses semicircle shaping dies to suppress then.For reducing the resistance of mould to conductor, the present invention adopts " non-resistance progressive forming " method to suppress, and promptly relies on the rectilinear motion of conductor wire core, drives mould and makes circular motion, by applying certain pressure conductor wire core is shaped, and guarantees the smooth not damaged of conductor wire core smooth surface.
In addition, when the extruded insulation layer, the uniformity in order to ensure insulation thickness, it is that semicircular conductor wire core carries out plastics and extrudes processing to cross section that the present invention utilizes " mould vacuum method (promptly; carry out plastics and extrude processing in the mould of vacuum) ", thereby has guaranteed the uniformity of insulating barrier effectively.
Fire-retardant principle of the present invention is: have a kind of fire retardant in the insulation of employing, the sheath material, the effect of this fire retardant mainly is when fire takes place, can play cable and outside air isolates, prolong cable by the burning time, stop the extension of flame effectively, when cable leaves naked light, cable in 5 seconds flame from putting out.
Fire-resistant principle of the present invention is: flame retardant coating is set in cable, and the material of this flame retardant coating mainly is made up of mica layer and fiberglass layer, and this properties of materials has excellent insulation property and fire-resistant, heat-resistant quality, can keep energising operation in 90 minutes in flame.
Copper coated aluminum dual-core flame-retardant refractory flexible electric cable of the present invention comprises circular flame-retardant refractory flexible electric cable of copper coated aluminum dual-core shown in Figure 1 and the semicircle flame-retardant refractory flexible electric cable of copper coated aluminum dual-core shown in Figure 2.
As shown in Figure 1, the circular flame-retardant refractory flexible electric cable of copper coated aluminum dual-core of the present invention comprises: have the conductor wire core 1 of insulating barrier 4, the cross section of this conductor wire core 1 is circular; Wrap up in two stranded or hinge joint described cable flame retardant coatings 5 together of bag with conductor wire core 1 of insulating barrier 4; And be extruded in flame retardant sheath layer 6 on the described cable flame retardant coating 5; Wherein: conductor wire core 1 constitutes by multiply conductive monofilament 11 is stranded; Every conductive monofilament 11 is made of aluminium conductor 111 and the copper clad 112 that are coated on outside the aluminium conductor 111.
Wherein, per share conductive monofilament 11 comprises that bundle lumps together the many conductive monofilaments 11 that constitute strand.
The circular flame-retardant refractory flexible electric cable of copper coated aluminum dual-core of the present invention also comprises the gasket for packing 6 that is filled between cable flame retardant coating 5 and the described insulating barrier 4.
As shown in Figure 2, the semicircle flame-retardant refractory flexible electric cable of copper coated aluminum dual-core of the present invention comprises: have the conductor wire core 1 of insulating barrier 4, the cross section of this conductor wire core 1 is semicircle; Wrap up in two stranded or hinge joint described cable flame retardant coatings 5 together of bag with conductor wire core 1 of insulating barrier 4; And be extruded in flame retardant sheath layer 6 on the described cable flame retardant coating 5; Wherein: conductor wire core 1 constitutes by multiply conductive monofilament 11 is stranded; Every conductive monofilament 11 is made of aluminium conductor 111 and the copper clad 112 that are coated on outside the aluminium conductor 111.
Above-mentioned two kinds of copper coated aluminum dual-core flame-retardant refractory flexible electric cables of the present invention can comprise the core flame retardant coating that is arranged between described conductor wire core 1 and the insulating barrier 4.Described core flame retardant coating comprises the mica layer 2 that is wrapped in described single conductor wire core 1 outer surface; And the glass layer (band) 3 of wrapped outer surface at described mica layer 2.
In addition, the diameter of conductive monofilament 11 of the present invention is 0.2～1.2mm, wherein: the diameter of aluminium conductor 111 is 0.18439～1.10635mm, and the thickness of copper clad 112 is 0.007805～0.04685mm, the cross section that is to say copper clad 112 accounts for 15 ± 2% of whole conductive monofilament 11, and all the other are the cross section of aluminium conductor 111.
As mentioned above, in above-mentioned two kinds of cables, insulating barrier 4 can be with flame-proof polyvinyl chloride or low-smoke halogen-free polyolefin insulated with material layer; Cable flame retardant coating 5 can be the cable glass layer; Flame retardant sheath layer 6 can be flame-proof polyvinyl chloride or low-smoke halogen-free polyolefin material guards layer.
The advantage of cable of the present invention is: few, in light weight with copper, cost is low. Owing to adopt many radicals, little The monofilament structure of diameter, and strands technology, the cable particularly soft can be done any bending.
Although above the present invention is had been described in detail, the invention is not restricted to this, the present technique neck The field technique personnel can carry out various modifications according to principle of the present invention. Therefore, all former according to the present invention The modification that reason is done all should be understood to fall into protection scope of the present invention.
Claims (10)
1, a kind of copper coated aluminum dual-core flame-retardant refractory flexible electric cable manufacture method comprises:
Copper-clad aluminum conductor is made the step of single conductor wire core (1);
Form the step of core flame retardant coating (2,3) at described single conductor wire core (1) outer surface;
Insulating material is extruded on the described core flame retardant coating (2,3), forms the insulation processing step of insulated wire cores with insulating barrier (4);
Two insulated wire cores with described insulating barrier (4) are carried out the stranding processing, form the step of cable; And
On described cable, extrude plastic refractory to form the step of flame retardant sheath layer (6).
2, method according to claim 1, wherein the step of stranding processing comprises:
It is stranded to utilize cabler that two eradication edge cores are carried out, and forms wire harness;
On described wire harness, form cable flame retardant coating (5), to form cable; And
Between cable flame retardant coating (5) and two insulating barriers (4), fill filler (7).
3, the semicircle flame-retardant refractory flexible electric cable manufacture method of a kind of copper coated aluminum dual-core comprises:
Copper-clad aluminum conductor is made the step of single conductor wire core (1);
Single conductor wire core is processed into the step that cross section is semicircular conductor wire core (1); At described cross section is the step that semicircular conductor wire core (1) outer surface forms core flame retardant coating (2,3);
Insulating material is extruded on the described core flame retardant coating (2,3), forms the insulation processing step of insulated wire cores with insulating barrier (4);
Two insulated wire cores with described insulating barrier (4) are carried out the stranding processing, form the step of cable; And
On described cable, extrude flame retardant plastics to form the step of flame retardant sheath layer (6).
4, method according to claim 3, wherein the step of stranding processing comprises:
Utilize cabler that two its cross sections are respectively semicircular insulated wire cores and carry out strandedly, form wire harness; And
Wrapped cable flame retardant coating (5) on described wire harness is to form cable.
5, require each described method according to aforesaid right, wherein the step at single conductor wire core (1) outer surface formation flame retardant coating (2,3) comprises:
At described single conductor wire core (1) the outer surface mica layer (2) that is wrapped; And
The wrapped glass layer of outer surface (3) at described mica layer (2).
6, require each described method according to aforesaid right, the step of wherein copper-clad aluminum conductor being made single conductor wire core (1) comprises:
Utilize wire drawing machine that copper-clad aluminum conductor is drawn into single conductive monofilament (11);
Utilize the annealing machine that described single conductive monofilament (11) is carried out annealing in process;
Utilize the synnema machine with several conductive monofilament Shu Hecheng strands of having annealed;
Utilize stranding machine that several described strands are twisted into conductor wire core (1).
7, method according to claim 6, wherein, the described drawing angle that copper-clad aluminum conductor is drawn into single conductive monofilament (11) is 12 °～14 °; Annealing temperature in the described annealing in process is controlled at 540 ± 10 ℃.
8, a kind of copper coated aluminum dual-core flame-retardant refractory flexible electric cable of making according to claim 1,2,5,6,7 each methods comprises:
Conductor wire core (1) with insulating barrier (4), the cross section of this conductor wire core (1) are circular;
Cable flame retardant coating (5) is wrapped up in the stranded two described cables that have the conductor wire core 1 of insulating barrier (4) and form of bag; And
Be extruded in the flame retardant sheath layer (6) on the described cable flame retardant coating (5); Wherein:
Conductor wire core (1) is by the stranded formation of multiply conductive monofilament (11);
Described conductive monofilament (11) is by aluminium conductor (111) and be coated on outer copper clad (112) formation of aluminium conductor (111).
9, a kind of copper coated aluminum dual-core flame-retardant refractory flexible electric cable of making according to each method of claim 3-7 comprises:
Conductor wire core (1) with insulating barrier (4), the cross section of this conductor wire core (1) are semicircle;
Cable flame retardant coating (5) is wrapped up in the stranded two described cables that have the conductor wire core (1) of insulating barrier (4) and form of bag; And
Be extruded in the flame retardant sheath layer (6) on the described cable flame retardant coating (5); Wherein:
Conductor wire core (1) is by the stranded formation of multiply conductive monofilament (11);
Described conductive monofilament (11) is by aluminium conductor (111) and be coated on outer copper clad (112) formation of aluminium conductor (111).
10, according to Claim 8 or 9 described copper coated aluminum dual-core flame-retardant refractory flexible electric cables, the diameter of wherein said conductive monofilament (11) is 0.2～1.2mm, the diameter of aluminium conductor (111) is 0.18439～1.10635mm, and the thickness of copper clad (112) is 0.007805～0.04685mm.
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| CN105304215A (en) * | 2013-06-04 | 2016-02-03 | 江苏亨通线缆科技有限公司 | Device for producing two-core flame-retardant flexible cable for communication power supply |
| CN105390216A (en) * | 2013-06-04 | 2016-03-09 | 江苏亨通线缆科技有限公司 | Low-stress stranding device for communication device power supply flexible cable |
| CN105304214A (en) * | 2013-06-04 | 2016-02-03 | 江苏亨通线缆科技有限公司 | Efficient cabling device used for communication power supply flexible cable |
| CN105304224A (en) * | 2013-06-04 | 2016-02-03 | 江苏亨通线缆科技有限公司 | Stranding mechanism for two-core communication power line |
| CN103354131A (en) * | 2013-06-04 | 2013-10-16 | 江苏亨通线缆科技有限公司 | Effective cabling apparatus for communication flexible cable |
| CN103354131B (en) * | 2013-06-04 | 2016-01-13 | 江苏亨通线缆科技有限公司 | The efficient cabling device of communication flexible cable |
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