... siemens motor,220V,380V 3,aluminum gear 4,stainless steel diamond floor grinding machine is not only ... It is good for grinding and polishing in large area, and greatly consume time and labor.Performance ... motor, it is good for grinding the large area;2,All gear box and motor is ... concrete, marble, granite, terrazzo with various grit of diamond metal, resinbond.3, Remove painting, coating, epoxy, urethane ...