... collectors, vent pipes, car lines, cable sleeve pipes and ornamental light fixture corrugated pipes. 2.5 The materials can be PE, PVC, PP and ... series single-screw extruders, PVC-U core foaming pipe units, high-speed PVC hard pipe units, profiled bar units, PVC granulator units, SJW series ... foaming sheets for doors, PE and PPR pipes, PE thick plates, PC hollow grid plates, PVC and PE bellows, PE and PP ...