... steel plate,black metal,non-ferrous metal,nonmetallic work piece, copper plate, aluminium plate.Polishing the rags, edge, oxide skin, ... , Only for metal products. For thin stainless steel, aluminium, copper work pieces, special holder can be installed.Easy manipulated and ... fixed with mechanical drive and high-class electric CabinetThis machine is used for surface polishing. It has the movements; ...