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Cutoff grade : ウィキペディア英語版
Cutoff grade

In mining, the mine cut-off grade is the level of mineral in an ore below which it is not economically feasible to mine it. The mill cut-off grade is the level below which already mined ore is not worth processing.
The mine cut-off grade is estimated or chosen during a mining feasibility study.



抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Cutoff grade」の詳細全文を読む



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