3d cnc engraving machine for marble ,wood, glass high precision glass engrave multifunction machine CE,FDA 3d cnc engraving machine for marble ,wood, glass Features: 1.Excellent ... design ensure stable transmission. Application:3D/2D engraving,Embossment,Line engraving ,Cutting,Edge inversing,Drilling on Natural stones, ... axis, Ball Screw of Z axis 3d cnc engraving machine for marble ,wood, glass