Mining and Oil Industry. A discernible indication of the presence of a desired metal or mineral in a mining ground, or (in later use) of oil or…
| 单词 | θ210329 |
| 释义 | society > occupation and work > industry > mining > [noun] > prospecting > indication of metal in mine (1) show1756 Mining and Oil Industry. A discernible indication of the presence of a desired metal or mineral in a mining ground, or (in later use) of oil or… |
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