... ,electroform,metal color, metal plating,electrophoresis, polishing,Aluminum color Multi-functional High speed electronic engraving machine is one of used specific ... of practicality new type 012101210661.5, patent of outside design 01 3 10638.4, patent of invention 01105380.1 etc, ... clearly, enduring, no change color, no fall off, withstand a high temperature , and anti-organic solvent scours, it fit to ...