ram-air pipe

例句：

1. 1. The engineer designed the ram-air pipe to improve efficiency.
   工程师设计了这种空气管道来提高效率。
2. 2.The new air ducting system is expected to reduce noise levels in the building.
   新的空气管道系统预计将降低建筑物内的噪音水平。
3. 3.The air ductwork was installed during the construction phase of the project.
   在该项目的建设阶段安装了空气管道。