... three layers PE packing film, it is high quality and technology. Three 3 layers co-extrude PE film blowing ... liquid food, like soft drink, milk, pure water. Etc., and widely used for making bags, protecting bags, light-tight bags ... .CHARACTERISTIC1. Pioneer® frequency inverters for Main motor and traction motor speed control.2. Screw and barrel: Dual 38CrMoAlA after nitrogen treatment, supplied from ...