... with over 17 years history on manufacturing and sales. Rice milling machine CWM series super vortex grinder is a univeral superfine pulverizer ... as high efficiency, fine in granularity, adjusting granularity without stopping machine, etc.. It can be widely used in chemical, dye, ... got the patent of this pulverizer. It was awarded the gold prize in China National Patent Technology Expo in 1994, was ...