... Screw Extruder45/30 Single-screw Host1.1 Screw Screw diameter: 45mm Screw Aspect Ratio: 30:1 Screw speed (max): 130r/min Screw Type ... hardness ≥ 700 1.2 Spiral tube Spiral tube diameter: 45mm Spiral tube material: 38CrMoALA Processing Technology: ... machinery , Steel pipe anticorrosion production equipment , Single screw extruder , double screw extruder , greenhouse equipment , Mulch film machine , ...