outfall fan

例句：

1. 1. The outfallfan is used to remove wastewater from the building's plumbing system.
   排风扇用于从建筑物的水管系统中去除废水。
2. 2.The outfall fan is essential for maintaining clean air in a room.
   排风扇对于保持房间内空气清洁至关重要。
3. 3.The outfall fan is designed to prevent water from entering the building's HVAC system.
   排风扇的设计目的是防止水进入建筑物的空调和供暖系统。