falling head permeameter

例句：

1. 1. The falling head permeameter is used to measure the flow rate of liquids.
   下降头渗透仪用于测量液体的流速。
2. 2. This new model of falling head permeameter has a more accurate measurement.
   这款新的下降头渗透仪具有更精确的测量。
3. 3. The falling head permeameter was developed by a team of experts in fluid dynamics.
   下降头渗透仪是由流体动力学专家团队开发的。