variable-head permeameter

例句：

1. 1.The variable-head permeameterwas used to measure the water content ofthe soil.
   可变头渗透计被用来测量土壤的含水量。
2. 2. Thevariable-head permeameter was used to monitorthe water flow in the pipeline.
   可变头渗透计被用来监测管道中的水流。
3. 3. The variable-head permeameter was used to detect any leaks in the system.
   可变头渗透计被用来检测系统中的任何泄漏。