... Approved 2. OEM service available 3. Material: Copper (Aluminum Bronze, Bronze, Silicon brass) Iron(Ductile iron)and so ... :http://wxzhongming.en.alibaba.com/Feature:1.Materialcopper alloy(Aluminum Bronze, Bronze, Silicon brass, Tin bronze and so ... milling machine, drilling machine, numerical lathe, all types of lathe.7.Surface finish processpolishing, sand blasting, heat treatment, painting, powder ...