RAAF

例句：

1. 1.The engineer used the RAAF to measure the airflow in the room.
   工程师使用RAAF来测量房间里的空气流动情况。
2. 2. During a storm, the RAAF helped to reduce the wind speed and prevent damage to the building.
   暴风雨期间，RAAF有助于降低风速，防止对建筑造成损害。
3. 3. The RAAF was used as a tool to improve the indoor air quality in the office.
   RAAF被用作改善办公室室内空气质量的工具。