In order to improve the flexibility of the power line to facilitate the laying device, the conducting wire core accepts a number of monofilament strands.It can be divided into the rule twisted and the non - rule stranding in the way of the wire core stranding.The rules are divided into non twisted strands, one cutter, special twisted etc..In order to reduce the occupied area of the conductor and reduce the geometric size of the power supply line, the twisted conductor is also pressed by a compact way to make the popular circle change into a semicircle, a sector, a tile shape and a compacted circle.The conductor is first used in the power line.