... 4,for concrete,terrazzo planetary concrete floor polishing machine is not only grinding and polishing concrete, marble,granite, terrazzo, but ... also for repairing, grinding, polishing, crystallizing millstones.planetary concrete floor polishing machine HWG 78 has the quickest motor speed, ... 780mm Disc Diameter 250mm*3 Disc Drive Gear drive type Water Tank 30L Noise 65DB Packing 1100*900* ...