برغي مزدوج خرساني PVC للطارد PVC

 PVC concial screw  barrel for PVC EXTRUDER Diameter 35/75 45/95 45/100 Min.Order 1 set Materials   38CrMoAIA 42CrMo(JIS SCM440) 9Cr18MoV CW6Mo5Cr4V2 SKD61   Discount  Available Application   ABS,PVC,PMMA Pipe,Sheet,Profile   Payment  Term T/T, L/C Technical  Process   1.Rough Machining 2.Quenching  and Tempering 3.Finish Machining 4.Nitriding 5.Spraying and welding with alloy power 6 .Screw polishing   Technological  Parameter  Roughness Ra 0.4um ...