... gravel'.b. There is almost no wearing parts except screen mesh.c. The machine usage life is long.Working ... Feeder, Ball Mill, Rod Mill, Raymond Mill, Conveyor, Vibrating Screen, Flotation Machine, Magnetic Separator, Shaking Table, Spiral Classifier, Thickener ... Filter, Drier, Rotary Kiln, Sand Washer, Sand Production Line, Metal Processing Equipment, etc. Elva Wu/ Sales Department Skype: defy003 ...