diamond floor grinding machine 1,for concrete,terrazzo,epoxy 2,siemens motor,220V,380V 3,aluminum gear 4,stainless steel diamond ... hp motor, it is good for grinding the large area;2,All gear box and motor is made of Aluminum alloy ... For coarse grinding, medium grinding, fine polishing, crystallization, preparation, maintenance.2, Polish concrete, marble, granite, terrazzo with various grit of diamond ...