... :304 stainless steel,316 stainless steel Machining process:milling,lathing,routing,refining stainless steel valve part ,1 ... 4.Surface treatment:, chroming,desalting,etc5.Metal processing: milling,lathing,routing,refining ,etc Item Name stainless steel valve ... or seam welding,,metal assembly,CNC Laser cutting,punching, folding and bending, CNC machining,drilling,powder coating,pressing part,polish,etc ...