... ;3, Two motors to choose: 380-400V, Three P; 220-240V, One P;4, Water tank and vacuum port provide wet and dry ... ;2, Grinding concrete or terrazzo;3, Repairing damaged concrete slabs;4, Removing epoxy thin-coats;5, Grinding sharp grout, mastic, flint ... can hold 3 pieces; The disc plate of HWG550 Foot board, turn down the machine, for equip the diamond tools; .... wet ...