The engineering machinery components include casting parts, forging rings and some small forging parts. They are assembled on some crawler excavators or some wheeled machineries. Construction machineries demand high strength during its operation, so it requires its components with high density, even tiny defects cause big accident. Xinlong pay more attention on the component's strength and safty. Forging rings require high strength which must support the thin wheels in order to fit the application requirements. The small forging parts are like locks to fit final assembly, this requires the part dimensions must be accuratly.

;;