... and commissioning.The machining workshop, rivet welding workshop, casting / forging workshop and other branch factories what affiliated ... different rollers for plain cast iron roller, centrifugal roller, normal steel casting roller, semi-steel roller, normal steel ... parts: CrMo ductile cast iron indefinite chill, high NiCr centrifugal casting, ZU70Mn2, semi-steel, 60CrMnMo,9Cr2Mo, and any other ...