... of metal engraving machine: you can make your own choice for engraving any picture on it. with high precision, high speed, lower cost, ... machine: It can be electroformed of nickel, copper, iron, chromium, tin, zinc, 24k gold, pure silver, etc. with a strong power, high speed ... of plating machine: It can be plated for all materials on decorated plating, odd metal plating, alloy plating, special type ...