... 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 ... fall in the bad soil, the cable cans bear the equal dint outside the machine with pull the dint.YJV72YJLV72XLPE insulation, have ...