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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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更新时间:2025/1/24 14:55:51