... .3. Utility: machinery, autos, equipments.4.Surface treatments:deburr,polishing,sandblasting,nickel plating,chrome plating,oxidation,plastic,spray-paint,ect. 2 ... services 3. Secondary machining 4.Surface treatment (Tumbling, Polishing, Tapping, Sandblasting and so on) 5. OEM & ODM services 6.Assembly work ...