polish machine 1,for concrete,terrazzo 2,industrial surface ground 3,electric heavy ... 1, Pre-treat and level the concrete surface before epoxy coating;2, Grinding and polishing concrete, marble, granite, terrazzo;3, ... to change diamond tools.3, Wet grinding: water tank; Dry grinding: Vacuumcleaner;4, Hand can be adjusted 360 degree ... effect of grinding and polishing:.... HWG 59 concrete polish machine