... and chromate plating 3.ISO9001:2008 Machining precision parts 1. Product Introduction Item DescriptionNameCNC machining ... part:Copper machining part:Precision machining partMaterialBrass C37710/CuZn39Pb2,C36000,C37700Surface TreatmentZinc ... , elbow, tee, nut; Auto-lathe turning precision part: precision electronic parts, fasteners, and other jeweler accessories.( ...