1. The flue isn't drawing. 
   烟道不通风了
2. The main flue on a chimney. 
   烟烟囱内的主要通气管
3. A ventilating shaft, as in a mine. 
   （比如矿井中的）上风井
4. A slatted, ventilating opening, as on the hood of a motor vehicle. 
   放气孔有条板的换气口，比如在车辆的引擎盖上
5. A passageway or shaft in which air circulates, as in ventilating a mine. 
   通风道，换气坑空气流通的通道，如使矿井通风的风道

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• 1. 通风管道
  ventilating flap 通风瓣...ventilating flue 通风管道...ventilating furnace 通风炉
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