Low-frequency cables with polyolefin insulation and moisturebarrier polyolefin sheath. Part 3: Unit type, unfilled, moisture barrier polyethylene sheathed cables with copper conductors and solid or cellular insulation

• 聚烯烃绝缘和带聚烯烃防潮层护套的低频电缆。第3部分:组合式、无填充、固体或泡沫绝缘的聚乙烯防潮护套铜导