... 2,Good quality 3.durable in use Single Screw Extruder45/30 Single-screw Host1.1 Screw Screw diameter: ... Gear Box Lubrication: forced oil circulation lubrication Gear: fine turning,quenching and tempering, nitriding tooth grinding Gear Material ... , Plastic blowing machinery , Steel pipe anticorrosion production equipment , Single screw extruder , double screw extruder , greenhouse equipment , Mulch ...