... , 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 ... the PVC pelleting and so on.B: The orthokinetic double screw rod cylinder, suits PVC and other material modification pelletizing . screw ...