... advantage:good quality,high technology,fine management ItemCNC processing mechanical shell Material SteelSteel,stainless steel,aluminum,brass,etc Making process Laser ... Welding,Mig welding,Riveting,Grinding,Stamping,Assembing,etc Surface treatment Powder coating,Hot galvanized,Painting,Polishing,Brushing,Cata phoresis,Chrome/Zink ...