... Designed 2.High Strength,Compact Dimension PV series general helical gear box We ,Lucheng screw Machinery Factory, is one of the ... .Low NoiseAll key components are finished by precisely machining, accurate assembly, and finally tested, and therefore, fairly low noise is reached ... Pictures of Screw Barrel :Welcome to contact us!Ths Series gear box for extruder machine(PVC, PP, PE, PA, PC, ABS ...