oil cooled silicon controlled rectifier for tin 1.advanced technology 2.complete functions 3,high quality oil ... usageSuitable for plating acid copper, alkaline copper, coke copper,nickel, tin, zinc, electroforming and other metal surface treatment,Especially adapted to ... oil cooled , Seperate the power from corrosive gas , The external case sprayed by epoxy paint ,can be put beside the plating ...