A pit or trench sunk through surface deposits in order to locate a vein of ore and ascertain its extent. Also costean pit.
| 单词 | θ211886 |
| 释义 | society > occupation and work > workplace > places where raw materials are extracted > mine > [noun] > excavated area > in order to find direction of lode (1) costean1778 A pit or trench sunk through surface deposits in order to locate a vein of ore and ascertain its extent. Also costean pit. |
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