... a protective barrier. 3) The surface of multi-layer plating processes,resistant to corrosion and durable 4) ... clean function,saving time and effort. 7)Machine Type:100T,128T,200T,320T,500T,ect.8)Client ... a protective barrier. 3) The surface of multi-layer plating processes,resistant to corrosion and durable 4) ... clean function,saving time and effort. 7)Machine Type:100T,128T,200T,320T,500T,ect.8)Client ...