Composite stainless steel tube fiber unit, High strength steel wire armored inside. Hermetically metallic sealed, HDPE sheath.

复合不锈钢管光纤单元，高强度钢丝内铠，金属管密封，高密度聚乙烯护套。

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Composite stainless steel tube optical fiber unit, PDPE inner sheath, medium carbon steel wire armour, Ditumen coating, polypropylene yarn wrapping covering.

不锈钢管光纤单元，聚乙烯绝缘内护套，钢丝铠装，沥青浇灌，聚丙烯绳外被。

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