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Mineral mining
The extraction of valuable minerals or other geological materials from the earth for economic interests.
Industry: Mining
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Mineral mining
離別液體
Mining; General mining
任何在杜邦選礦過程中使用的幾種液體 — — 如 tetrabromethane、 二溴乙烷、 三氯乙烯 — — pentachlorethane。
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