... 10638.4, patent of invention 01105380.1 etc, via of testing report from National product quality & control bureau: NPQC No.3 ... colored for metal arts and crafts, signboard, gold cards, plate picture etc.7. Work as one of plating machine: It can be ... of electronic equipment, clothes accessories, leather accessories, etc. 8. Work as one of metal print machine: It not only engraves copperplate, and steel ...