... over six years and the annual order quantities are over ten million. 1) Material can be stainless steel, iron, copper or ... Surface treatment according to customer's requirements can be polishing,zinc plating, nickel plating or chrome plating, acid washing ... Methods: CNC Machining, General Engineering, Turning, Drilling, Polishing, Knurling,Tapping, Threading, Burnishing, Slab Milling, Face Milling ...