gear box for extruder machine 1.Highly Standard Modular Designed ... 3.Long Service Life PV series general helical gear box We ,Lucheng screw Machinery Factory, is one of ... It is therefore easy to realize different solution for varied requirements.2.Transmission RatioFeatured many closely divided ratios ... Pictures of Screw Barrel : Series double screw gear box for extruder machine(PVC, PP, PE, PA, PC, ABS ...