... electroform,metal color, metal plating,electrophoresis, polishing,Aluminum color Multi-functional High speed electronic engraving machine is one of used specific ... 10638.4, patent of invention 01105380.1 etc, via of testing report from National product quality & control bureau: NPQC No.3 ... . 200150013, as well as via of testing report from the National environment inspection bureau: SH(YWJ)No ...