... protector and waterproof 2.automatic water-supplying cooling system 3.3D/2D engraving,Embossment,Line engraving ,ect. Features:1.Excellent design ... .4.Dust protector and waterproof design ensure stable transmission. Application:3D/2D engraving,Embossment,Line engraving ,Cutting,Edge inversing,Drilling on ... X,Y axis Ball screw of Z axis. Marble Engraving Machine