Screw Barrel, Twin Screw Barrel, Extrusion Screw Barrel manufacturer / supplier in China, offering Conical Twin Screw Barrel Double Screw Barrel Extrusion Screw Barrel Extruder, Bimetallic Screw Barrel for Recycling Extruder, R121|AC333|Bnw830|X800 Equivalent Bimetallic Alloy Coating Barrel with Screw for Extrusion, Injection and Blow Moulding Machines to Process Pet HDPE PP PVC PE and so on.