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2013-05-23 12:21
求翻译：An underground mine normally uses backfill to assist in maximising the recovery of the ore in the mine, as the value of the material processed, refined and sold offsets the cost of the backfill placed. In addition this also allows the mine to recover more of the mineral resource, creating an opportunity to increase the是什么意思？ 待解决
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An underground mine normally uses backfill to assist in maximising the recovery of the ore in the mine, as the value of the material processed, refined and sold offsets the cost of the backfill placed. In addition this also allows the mine to recover more of the mineral resource, creating an opportunity to increase the
问题补充： |
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