Extrusion Line, Plastic Machinery, Single Screw Extruder manufacturer / supplier in China, offering Three-Layer PE Coating Steel Pipe 3lpe Anti-Corrosion Pipe Coating Machine, HDPE Pipe Extrusion Line Plastic Pipe Extruder HDPE Solid Wall Pipe Extrusion Line Φ 75-Φ 250mm, 3-Layer PE Coated Steel Pipe Extrusion Making Line for Oil and Gas Transmission Pipelines and so on.