roughing bed roughing filter
roughing filter roughing bed
contact roughing filter
continuous roughing mill group
Four-high roughing mill
maximum reduction at the roughing mill
Primary grinding and roughing
Roughing
粗
粗轧
粗选
低
粗磨
粗滤床
粗选段
粗加工
冲毛
凿毛
手工梳麻
初步加工
低真空
粗削