Extrusion Line, Plastic Machinery, Single Screw Extruder manufacturer / supplier in China, offering Water Supply and Drainage or Wire and Cable Laying HDPE PP Double Wall Corrugated Pipe Production Line, High-Speed Corrugated Pipe Extrusion – Engineered for HDPE/PP Double Wall Corrugated Pipe, Municipal Water Supply Sewage Water Pipeline HDPE PP PE Double-Wall Corrugated Pipe and so on.