... coutinously working 3.marking speed 7m/s laser marking and engraving machineHW YAG-ZJ50W-II adopts imported high efficiency ... semiconductor embattle laser, and pump Nd.YAG Crystal stick. It is high ... copper, aluminium, magnesium, zinc, etcâ?¦), rare metal and alloy(gold, silver, titanium), metal oxides, ABS materials (enclosures of electrical appliances, ...