... 4,Good after-sales service 1.Name:forging rotor used for turbo generator2.Material:alloy steel or stainless steel3.Certificates: ... of castings and forgings such as turbine impeller, wind power spindle, heavy load gear, ship shaft, roller, tube ... applied in such domestic industries as wind power, chemical engieering, machinery, automobile, vessel, power station, metallurgy, mining, and petrochemical. ...