... and process artA. The material of rollers-- 45# steel.B. Manufacturer-ChinaC. Process art- cast steel ingot—forge semi finished ... strength≥HRC45-50.Welding joint componentsIncludes--rack of machine, base,and other steel components.Art-flow of welding components ... , main motor device, balance device, rack of machine, base and so on.Electrical control systemLubrication systemComponents related to the ...