1.Structure: various structure designs such as spiral flow channel and jacket type 2.Processing size and precision: Roughness：RA0.005 the maximum outer diameter：2000mm the maximum length：8000mm the maximum processing precision ：0.002mm 3.Application: Printing and dyeing industry: calendering of pure cotton, polyester cotton, silk, chemical fiber, hemp, wool and their blends. Leather industry: calendering of artificial leather, etc. Plastic industry: PVC, ABA, PP, PT, PC and other plastics. Papermaking industry: surface calendering of various papers. Metallurgical industry: rolling and pressing of various non-ferrous metals