... high quality 3,large gear polisher 4,for concrete,stone artificial stone surface polisher is not only grinding and polishing concrete ... also for repairing, grinding, polishing, crystallizing millstones.artificial stone surface polisher HWG 70 has the quickest motor speed, from 300 rpm ... 1000*900*700mm The rotation way of artificial stone surface polisher HWG 70: The diamond tools to be chosen: The ...