... 9001-2000 approved Item name High stasndard sheet metal part Material Steel,stainless steel,aluminum,brass,etc Making process ... Punching,CNC Bending,Tig Welding,Mig welding,Riveting,Grinding,Stamping,Assembing,etc Surface treatment Powder coating,Hot galvanized,Painting ... Tig welding machines;Mig welding machines,Spot welding machines;stamping machines;Rolling machines;Pipe bender;U-shape extrusion ...