To meet the requirements of international market, our company develops YAG-504C laser subsurface engraving machine which accords with the CE standard of EU. That model possesses the functions and virtues of the original models, 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 processes of crystal craftworks. That model makes a great improvement on laser safety precautions, and according to the CE standard and the international safety standard of low-pressure electric appliances, it adopts closed engraving method and safety interlocks to insure the operation safety and maintainers’ security. 1. Product main technical index Laser Medium Nd：YAG Laser Wavelength 532nm Highest Frequency of Laser Power Supply 100HZ Power of Servo Motors 3?00W Maximum Engraving Range 300mm?00mm?0mm Engraving Speed 3000～5000dots/min Power of Laser Power Supply 2 KW Laser Head Number 8 Continuous Working Time 12 hrs Working Current of the Whole Machine 20 A Deadweight of Main Machine 260 kg Dimension of Main Machine 980mm?60mm?200mm 2. Technical index of circulating water cooler Cooling Power 3 KW Water Medium deionized water or pure water Water Supply Pressure 0.1 Mpa Consumed Power < 2KW Weight 120kg Dimension 650mm?50mm?75mm