Marble Laser engraving machine 1.high power CO2 laser tube 2. water-cooling 3.DSP controlling system Marble Laser engraving machineDM- ... supported: BMP, PLT, DST, DXF, and AI 10. Driving system: Three-phrase stepper 11. Auxiliary equipments : Exhaust-fans, air-exhaust pipe ... laser path visible4).USB port, the unit that makes the machine work without a computer 3.Applicabe materialacryl, perspex, glass, ...