1.cnc stone engraving machine 2. Original PMI rail and double-screw 3. Water-cooling 3KW spindle 4. Engraving speed 8-12m/ Features 1. Mechanical structure: industrial pipewelding founded lathe, eliminates welding stress, ganty maching center operation ensures body accuracy, rigidity and stability.2. Original PMI double-screw, nut driver or high-precision rack drive, PMI rail, make geomotric ...