... copper, alloy steel, stainless steel, carbon steel, aluminum etc ISO9001 2000 quality contro CNC Machining. Material: brass, copper, bronze, stainless steel ... welding parts, assembly service.4. ISO9001 2000 quality control5. Strong engineering team makes high quality; own test equipments and 100% inspection ... drawing. Any information or inquires will be highly appreciated and given the best attention.