... extruder, vacuum shaping platform, tractor, cutter, drainage pipe, core foaming pipe, muffling drainage pipe (hollow spiral pipe, solid wall ... calibrators and thickness for agricultural water supply and drainage, building supply and drainage, cable laying, etc. 4.The twin-screw ... claws, etc. After mating with special devices, muffling drainage pipes and core foaming pipes can be produced. Extruder for ...