绝缘材料：高密度聚乙烯，按照全色谱标准标明绝缘线的颜色。

Insulation: High density polyethylene or polypropylene, color coded in accordance with standard telephone industry code.

youdao

绝缘材料：高密度聚乙烯，按照全色谱标准标明绝缘线的颜色。

Insulation: High density polyethylene or polypropylene, color coded in accordance with standard telephone industry code.

youdao