... as per customers' request 4.Surface treatment:, chroming,desalting,etc5.Metal processing: milling,lathing,routing,refining ,etc Item Name stainless steel ... machine,CNC shearingManufacture processingstamping ,deep drawing,spot or seam welding,,metal assembly,CNC Laser cutting,punching, folding and bending, CNC machining ... ,powder coating,pressing part,polish,etc. wedge disc for Knife gate valve part