... workpiece, combined etching process, completion of the sign on the etching surface finishing,( for example gold, silver, citicall limited) partial pay-ment ... heap,( for example phnom penh, gold nickel, split plate) processing, In order to achieve the produ-ction of exquisite, beautiful appearance ... equipm-ent for production. Application:It is appliable in heap gold, laser tag, gold dust or DD label ...