Fibre-optic cable for laying in cable ducts, collectors, tunnels, on bridges and overpasses, with a central optical tube made of polymer material PBT, inside of which there are from 2 to 8 optical fibres in the medium of hydrophobic filler, with an outer sheath made of polyethylene, not spreading combustion, with an armoured cover made of allumopolymer corrugated tape.
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