... Carbon Steel, Stainless Steel, Castlron, Aluminum, Copper, Brass and so on.2.Heat Treatment: Hardening and Tempering, High Frequency ... Quenching, Carburizing Quenching and so on.3.Surface treatment: Galvanizing/Zincplatin, Dacrotized, Black Anodic Treatrment ... , Bumishing, Sand-blasting and so on according to ROHS demand.4.Machines: We have two ...