... what affiliated to our company can manufacture various machining parts and equipments. For rollers, we can do different rollers ... hyperbolic roller, silica-gel roller.And here is the material (steel grade) of our machining parts: CrMo ductile cast iron indefinite ... chill, high NiCr centrifugal casting, ZU70Mn2, semi-steel, 60CrMnMo,9Cr2Mo, and ...