... drainage, cable laying, etc. The set consists of single screw extruder, vacuum calibrating bench, tractor, cutting machine, and turn ... drainage pipes, etc. The set consists of conical twin screw extruder, vacuum shaping box, tractor, cutting machine, turn ... characteristics. 2. Barrier type two stage mixing PP - R special screw, slotting machine barrel. 3. Configuration secondary FenLiuXing new mould, ...