... full frequency controller(including grinding head11kw×8discs), the merits of energy efficient and smooth operation make the machine suitable for polishing ... ,not only durable and but also accurate.4.A machine with multi-purpose function,if change the grinding head can polishing ... :frequency control 6,Biggest products:500×500 7,Machine power:11kW×8+4kW 8,Weight:9T Floor grinding and polishing machine