... PVC sheath power cableTo be laid indoors, in tunnel, cable furrow or pipe, the cable couldn't bear mechanical force outside YJYYJLYXLPE insulation ... tape armor, PVC sheath power cableTo be laid underground, the cable could bear certain mechanical force, but it couldn't bear ... cent to cross the magnetism piping mutually when single-core cable establish, the in order to prevent results in the descent ...