The cerusite can be collected by xanthate without sulfuration, however the flotation indexes are not good.在不硫化的条件下,黄药能够浮选白铅矿, 但浮选指标不高.Expounds liquid level control system of flotation machine and its industrial test.介绍浮选...
他并非生来就注定要从政的。His was not a political career predestined from birth.如果罪名成立，她可能在7年内不得从政。If found guilty, she could be debarred from politics for seven years.明福德弃商从政了。Minford closed down the business and went into politics....