Extrusion Line, Plastic Machinery, Single Screw Extruder manufacturer / supplier in China, offering Steel Pipe 3 Layer PE Coating Anti-Corrosion Pipeline Production Line for City Gas Oil Water Supply, 2lpe 3lpe Anti-Corrosion Coated Steel Pipe Machine for Oil & Gas Transmission Waterproof, Underground 3lpe Coated Steel Pipe Line for Oil & Gas Transmission Anti-Corrosion Waterproof and so on.