Home default Nitrided steel screw, material tube, high torque hydraulic motor drive, multi-stage injection pressure, good plasticizing performance. Nitrided steel screw, material tube, high torque hydraulic motor drive, multi-stage injection pressure, good plasticizing performance. Pvc Pipe December 22, 2019 Share: Facebook Twitter Pinterest Nitrided steel screw, material tube, high torque hydraulic motor drive, multi-stage injection pressure, good plasticizing performance. ... Click to read moreOthers news: Another news: