... CMM 3)OEM service 4)ISO9001:2000 5)casting OEM copper alloy CNC investment castingmaterialCopper, brass, bronze, aluminum bronze ... manganese brassAnd other copper alloy Processing stepCasting, sand blast, CNC lathe works, turning, finish machining featuresSmooth surface, High ... companies specialized in the copper alloy casting, forging and precision machining with annual output more than 1800 tons ...