1.High Quality OSD Conical Twin Screw Barrel 2.38CrMoAlA;42Cr.SKD61;GH113 3.Two Sections Design,wearproof 4.Wc/Co,Ni,Mo alloy Technological Process:Blanking→Rough Machining→Quenching & Tempering →Semi Finishing Machining→Finished Product→Detecting→Nitring/Alloy Processed →Finish Machining Product Appliance:Various high glass fiber, mineral fiber and PPA, PPS, PA6T, LCP,VO fire protection, ferrous ...