... , mutant, PM separation type, shunt type, barrier type, the vacuum exhaust type, combined type, work type, speed type, etc.," ... alloy steelTechnology: nitriding treatment, alloy coating spraying, heat-treatmentAppliance: PVC, PP, PE, PA, PC, ABS, AS etcDepth of Nitrated Layer: ... design drawing. The Reference Pictures of Screw Barrel : PE PP PVC ABS PS plastic injection molding machine screw and barrel