... ' request 4.Surface treatment:, chroming,desalting,etc5.Metal processing: milling,lathing,routing,refining ,etc Item ... T/T orL/C.Company introduction1)direct and professional manufacturer have 10 years experience in valve parts ... processingstamping ,deep drawing,spot or seam welding,,metal assembly,CNC Laser cutting,punching, folding and bending ... etc. wedge disc for Knife gate valve part