... 950-1020Hv3. nitriding brittleness: 2mmA: The flat conical double screw cylinder, suits to process each kind to fill lowly the ... the molding, the plate and soB: The hypercone double screw rod cylinder, suits each kind of PVC tubing, the molding ... processing. Even double screw rod cylinder A : Heterotropic double screw rod cylinder, suits the PVC pipe , the molding ...