... a new cable hose succeed to PVC plant pipe, double-wall corrugated pipe and multi-pipe. At present, it is ... characterized by corrosion-resistance, agereistor little friction coefficient of inner wall,good insulativity,and can be fixed very soon. It ... extrusion,cooling and finalizing the design,drawing and winding,the production line is characterized by high automaticity,even plasticzation,long life, ...