... formation 3.Blown film smoothness double-colour film blowing machine I plant the production of dualmode first prize is ... advanced technology,rolling formation,and high production1. the host machine from a drive,twosided article Mitoya Barrel and a die ... improve colorfilm production.2. Screw,cylinder used 38CrMoAl,after nitrogen treatment and precision machining formed,high hardness,resistance and high ...