阀帽

例句：

1. 1. The valve cap was damaged during the installation process.
   安装过程中阀门盖受损。
2. 2. The valve cap is essential for ensuring proper fluid flow.
   阀门帽对于确保流体正常流动至关重要。
3. 3.The valve cap needs to be replaced after a certain number of uses.
   使用一定次数后需要更换阀门帽。