Extrusion Line, Plastic Machinery, Single Screw Extruder manufacturer / supplier in China, offering Pert Pre-Insulated Pipe Manufacturing Machine with PU Foam Technology PLC-Controlled Extruder, Polyurethane Foam Pert Pipe Extruder Equipment for Underground Pipe Systems, Multi-Layer PE-Rt II Pipe Extruder Machinery with Polyurethane Foam Injection and so on.