pressure-drop manometer

例句：

1. 1. This pressure-drop manometer is used to measure the pressure difference between two points in a pipeline.
   这个压力下降式水银柱计用于测量管道中两点之间的压力差。
2. 2. The pressure-drop manometer was used to detect any leaks in the pipeline.
   压力下降式水银柱计被用来检测管道中的任何泄漏。
3. 3. The engineer carefully read the pressure-drop manometer readings to ensure that the pressure waswithin safe limits.
   工程师仔细阅读压力下降式水银柱计的读数，以确保压力在安全范围内。