... Good aftersales service 1. ApplicationThe new generation of laser marking machine YMM-50D is applicable to almost any material surface. ... much more stable and reliable. 2. Features Friendly man-machine interfaceStable, precise and high-speed systemFile format to support ... auto system self-protection 3. Technical parameter Laser medium:Nd3+:YAGWave length, nm:1064 nmBeam power ,W:50W Marking speed, mm ...