... , roller rotating, materials centrifugal, Evenly distributed around.3.Double-layer dies, up and down dual-use, reduce the cost ... mill's flat die is static, roller rotating, material centrifugal and distributed around evenly: using a unique double-layer high ... flat-die pellet mills rollers rotate to generate centrifugal force, but the die hole is inconsistencies with the material force. 3. Double-layer ...