Mining. A passageway or shaft for carrying air back to the outside.
| 单词 | θ75189 |
| 释义 | the world > matter > gas > air > fresh air > [noun] > supplying fresh air or ventilation > ventilator > passage, shaft, duct, or pipe > by which foul air ascends > in a mine (2) return1851 Mining. A passageway or shaft for carrying air back to the outside. vent1886 Mining. (See quot. 1886.) |
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