... the waterproof, dustproof system 3.5.5KW spindle 1218 Marble and Stone engraving machine Feature:1.X,Y,Z three ... have the waterproof, dustproof system3.Water cooling constant torque spindle with the imported bearing, high power, low tone4.Adopt Taiwan ... transducer with stable output signals5.Fully sgielded,bending circuity, and imported electronic ...