reversal flue

例句：

1. 1.The reversal flue was designed to improve airflow in the room.
   逆流烟道的设计是为了改善房间内的气流。
2. 2.The engineers had to install a reversal flue to solve the problem.
   工程师们不得不安装一个逆流烟道来解决问题。
3. 3. The reversal flue is essential for maintaining proper ventilation in the building.
   逆流烟道对于保持建筑物内适当的通风至关重要。