... 1. Material Available: Copper, Brass, Aluminum, Stainless Steel, Steel alloy, etc.(Material to process: aluminum, stainlesssteel, carbon steel, brass, lucite)2 ... production 2) Engineer spot check in production 3) QC inspects after mass production finished 4) International ... sales who were trained the technical know-how spot check before shipping.8.OEM service is available.All kinds of ...