Extrusion Line, Plastic Machinery, Single Screw Extruder manufacturer / supplier in China, offering HDPE Outer Protection Pipe Extrusion Line for Underground Thermal Heating, Hot Water, and Gas Distribution Networks, HDPE Insulated Pipe Outer Sheath Production Line Fully Automatic Vacuum Calibration Large Diameter Pipe Extrusion System, HDPE Pipe Extrusion Line Solid Wall Pipe Extrusion Line Φ 20-Φ 100mm and so on.