... module, computer controller module, control box module, laser power module, Q switch power module, cooling system module) each module own independent ... should adopt at least 75W laser) 2,Q switch has single head Q and double head Q (at least 100W)(If you use ... 150W above semi-conductor pump laser, you should use double Q switch)3,Rotating head D80 D504,Marking area (mm) 70 ...