... . Mainly used in electrical wire , house wire , power cable etc core wire insulation.2.2 PVC Sheathed ---- 70mm extrusion ... extruding . Mainly used in electrical wire , house wire , power cable, underground cable etc core wire Sheath. B Type (core wire twisting ) ... . Mainly used in electrical wire , house wire , power cable, underground cable etc core wire Sheath. We are a professional wire and ...