air valve cap

例句：

1. 1.The air valve cap was damaged during the engine overhaul.
   在发动机大修期间，气阀盖受损。
2. 2.The mechanics had to replace the air valve cap after the oil leak.
   机械师们不得不在油漏之后更换气阀盖。
3. 3. The air valve cap is essential for maintaining proper engine performance.
   气阀盖对于保持适当的发动机性能至关重要。