Extrusion Line, Plastic Machinery, Single Screw Extruder manufacturer / supplier in China, offering Electro Fusion Girth Welding Closure Tape for HDPE Hollow Wall Spiral Pipe, HDPE Electrofusion Sleeve Tape for Pre-Insulated Pipe Girth Welding, Electro Fusion Girth Welding Tape for Directly Buried Pre-Insulated Pipe and so on.