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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
威爾莫特跳汰機
Mining; General mining
一個籃子型跳汰機，籃子被暫停在一箱水。脈動受到向上和向下移動這個籃子裡，用古怪的人。已經被廣泛用於的無煙煤的所有大小和程度較輕，煤瀝青的製備。 ...
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