... welding, drilling , assembling, casting, grinding. Deep Groove Ball1, Processing : turning, milling, welding, drilling ,grinding, casting, assembling . ... steel , copper , brass , plastic , stainless stell and so on . 4, Specification as client’s draw ... and ISO9001 certificated ;3, OEM and free samples acceptable ;4, Fast reaction and globalization services , overseas branchs in Germany , Australia and ...