To meet the requirement of international market, our company develops TJ YAG-504C laser Subsurface engraving machine which accords with the CE standard of EU. That model possesses The functions and virtues of the TJ YAG-504 model,with 8 laser heads,thin dots.green laser,it can Engrave the same graphics inside 8 workpieces at the same time,which facilitates large quantities Of highly accurate production of crystal craftworks.This model makes a great improvement on laser safety precautions,and according to the CE standard.