... ,for concrete,terrazzo,epoxy 2,siemens motor,220V,380V 3,aluminum gear 4,stainless steel diamond ... is good for grinding the large area;2,All gear box and motor is made of Aluminum ... , medium grinding, fine polishing, crystallization, preparation, maintenance.2, Polish concrete, marble, granite, terrazzo with various grit ... 700mm Disc Diameter 380mm*4 Disc Drive Gear drive type Water Tank 30L Noise 65DB ...