convex head valve

例句：

1. 1. The engineer designed the new machine with a convex head valve to improve efficiency.
   工程师设计了这台新机器，带有凸面阀盖以提高效率。
2. 2.The valve is crucial for maintaining water pressure in the pipeline system.
   阀门对于维持管道系统中的水压至关重要。
3. 3. The manufacturer claims that their product has a superior convex head valve compared to competitors' offerings.
   制造商声称他们的产品在凸面阀盖方面优于竞争对手的产品。