intransitive. Mining. Of a vein: to open up or expand. Obsolete. rare.
| 单词 | θ6306 |
| 释义 | the world > the earth > minerals > mineral deposits > features of stratum or vein > [verb (intransitive)] > expand (1) chamber1873 intransitive. Mining. Of a vein: to open up or expand. Obsolete. rare. |
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