... 7 working days concrete resurfacing machine 1.Equipped with three heavy-duty motors and frequency converting, display excellent performance in ... of grinding machine were made of alumin-alloy,Equipped with heavy-duty aluminum alloy motor ,not only in weight,but ... fast to change the abrasives by New Multi-fuction support frame system.6.Streamlined design,Hommization folding handgrip,Separable Additional ...