... for grinding and polishing edges, curv Double Transmission Reduction Stone Wet Polisher Rated Voltage 220V/110VRated Frequency 50/60HzRated ... curvatures and removing scratches from the most different sorts of stone. 2 .Double transmission reduction, maximum torque, minimum motor load ... the motor , protection of the gearbox, easy gear head guiding, no water flows across motor and gear box 4. ...