What are the components of a communication mining cable?

I. What are the components of the communication mining cable? 1, wire: annealed bare copper wire, copper wire diameter of 0.30, 0.42, 0.52, 0.60, 0.70, 0.80, 0.90 (mm). 2, insulation: high-density polyethylene or polypropylene, in accordance with the full chromatographic standard labeling of the color of the insulated wire. 3, insulated pairs: two different colors of insulated wires according to the different pitch twisted into pairs, and using the prescribed chromatographic combination in order to identify the pairs. 4, communication cable core structure: 1 pair of basic units, more than 25 pairs of cable by unit combination, each unit with the prescribed chromatographic unit combination in order to identify the pair. 4, communication cable core structure: 1 pair as the basic unit, more than 25 pairs of cables by unit combination, each unit with a specified chromatographic unit ties around the tie, in order to identify the different units. 100 pairs and more pairs of cables plus 1% of the preparatory pairs, but no more than six pairs. Gaps in the core are filled with petroleum paste.5. Cable core wrapping: wrapped with polyester film tape.6. Shielding: copper wire shielding or rolled (or not rolled) metal tape, metal tape longitudinally wrapped outside the core wrapping of communication cables.7. Sheathing: blue low-density polyethylene. Can also provide double sheath communication cable.

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