... plating,electrophoresis, polishing,Aluminum color Multi-functional High speed electronic engraving machine is one of used specific liquid that to engraving ... 3 10638.4, patent of invention 01105380.1 etc, via of testing report from National product quality & control bureau: NPQC ... with a strong power, high speed, lower stress, and top quality. It suit for industries of board patternmaking by handset, ...