crank shape exhaust hood

例句：

1. 1.The car's crank shape exhaust hood is designed to improve airflow and reduce noise.
   汽车的曲柄形状排气罩设计用来改善空气流通并减少噪音。
2. 2.The engineer replaced the old crank shape exhaust hood with a new one.
   工程师用一个新的曲柄形状排气罩替换了旧的。
3. 3.The crank shape exhaust hood on the bike was designed to be more efficient at converting power into speed.
   自行车上的曲柄形状排气罩被设计来更有效地将动力转化为速度。