directaction pressure controller

例句：

1. 1.The direct action pressure controller is designed to regulate the flow of gases in a pipeline.
   直接作用压力控制器旨在调节管道中气体的流量。
2. 2. The direct action pressure controller was developed to improve the efficiency of the process.
   直接作用压力控制器的开发是为了提高工艺的效率。
3. 3. The direct action pressure controller is used to prevent overpressure in the system.
   直接作用压力控制器用于防止系统中的超压。