... Machining process:milling,lathing,routing,refining stainless steel valve part ,1)ISO9001:2008 certification.2)Over ... Machinery Co., Ltd. we are specialized in the large-scale welding, stamping, bending, punching, steel structure ... lathing,routing,refining ,etc Item Name stainless steel valve part Product description1)Material:304/316 stainless steel ... ,polish,etc. wedge disc for Knife gate valve part