مطحنة الرول العمودي النحاس
الرأسي مطحنة الرول على الفحم. Grinding trends in the cement industry. wide percentage of new ball mills for raw material and coal grinding is now only the vertical mill, the roller press (also known as high-pressure grinding roll) and the more than 660 mills were sold, 373 of them in 2007 and 289 in 2008 [3].