a structure for carrying one airway over another in a mine.
| 单词 | θ75186 | 
| 释义 | the world > matter > gas > air > fresh air > 			[noun]		 > supplying fresh air or ventilation > ventilator > passage, shaft, duct, or pipe > carrying one air-way over another in mine (1)		 air crossing1848 a structure for carrying one airway over another in a mine.  | 
	
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