hydraulic mean ratio

例句：

1. 1. The engineer calculated the hydraulic mean pressure in the pipeline to ensure safe operation.
   工程师计算了管道中的液压平均压力，以确保安全运行。
2. 2.The hydraulic mean value of the system was critical for its performance.
   系统液压平均值对性能至关重要。
3. 3. The hydraulic mean ratio of the pump is an important factor in determining its efficiency.
   泵的液压平均值是决定其效率的重要因素。