a structure for carrying one airway over another in a mine.
单词 | θ211928 |
释义 | society > occupation and work > workplace > places where raw materials are extracted > mine > [noun] > passage > ventilation passages or openings > bridge carrying (2) air crossing1848 a structure for carrying one airway over another in a mine. overcast1867 Mining. A bridge or support that carries one underground passage or airway over another; a passage or airway running above another. |
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