pressure vacuum vent valve

例句：

1. 1. The pressure vacuum vent valve is usedto control the flow of gases ina system.
   压力真空排气阀用于控制系统中气体的流动。
2. 2. The pressure vacuum vent valveis essential for maintaining proper airflow inthe engine.
   压力真空排气阀对于保持发动机中适当的气流至关重要。
3. 3. The pressurevacuum vent valve is designedto prevent backflow and maintainsafety in hazardous environments.
   压力真空排气阀设计用来防止回流并确保在危险环境中的安全。