nozzle flap

例句：

1. 1. The engineer inspected the nozzle flaps to ensure they were properly sealed.
   工程师检查喷嘴盖，确保它们密封得当。
2. 2.The technician replaced the nozzle flap with a new one to improve airflow.
   技术人员用一个新的喷嘴盖替换了旧的，以改善空气流动。
3. 3. During maintenance, the technician found a small hole in the nozzle flap and patched it immediately.
   在维护过程中，技术人员发现喷嘴盖有一个小洞，并立即进行了修补。