differential pressure meter

例句：

1. 1. The differential pressure meter is used to measure the difference in pressure between two points.
   差压计用于测量两个点之间的压力差。
2. 2. The engineer used the differential pressure meter to check the accuracy of the pipeline system.
   工程师使用差压计检查管道系统的精度。
3. 3. During testing, the differential pressure meter was used to monitor the flow rate and pressure changes.
   在测试期间，差压计被用来监测流速和压力变化。