A.1/4~1/3,3/4~2/3 B.2/4~1/3,1/4~1/3 C.1/4~1/5,3/4~4/5 D.1/3~1/5,2/3~1/4
A.稀介質(zhì)桶 B.中煤介質(zhì)桶 C.合格介質(zhì)桶 D.矸石介質(zhì)桶
A.凈化回收 B.濃縮 C.磁選 D.脫泥脫介