air conduit

例句：

1. 1. The air conduitis used to transport gases and liquids through the walls of buildings.
   空气导管用于通过建筑物墙壁输送气体和液体。
2. 2.The engineer designed a special air conduit to improve the efficiency of the ventilation system.
   工程师设计了一种特殊的空气导管，以提高通风系统的效率。
3. 3. The airconduit was installed in the ceiling, allowing for easy access to the HVACsystem.
   空气导管安装在天花板上，便于访问HVAC系统。