由于采用细筛再磨新工艺，近年来一些选矿厂已由两段磨矿改为三段磨矿。
Due to the fine screen new craft, grinding again in recent years some concentrator by two section has three segments grinding instead of grinding.
由于采用细筛再磨新工艺，近年来一些选矿厂已由两段磨矿改为三段磨矿。
Due to the fine screen new craft, grinding again in recent years some concentrator by two section has three segments grinding instead of grinding.
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