Composite stainless steel tube stranding,HDPE inner sheath,medium carbon steel wire armour,Ditumen coating,polypropylene yarn wrapping covering.
Composite stainless steel tube stranding,HDPE inner sheath,medium carbon steel wire armour,Ditumen coating,polypropylene yarn wrapping covering.
不锈钢管光纤单元绞合，聚乙烯绝缘内护套，钢丝铠装，沥青浇灌，聚丙烯绳外被。