变水头试验 falling head permeability
变水头透水试验 falling head permeability test
变水头渗透试验 falling head permeability test ; variable head permeability test
变水头渗透率仪 falling head permeameter
变水头渗透试验仪 Falling head permeameter ; Permeameter failling head
变水头法 variable head method ; variable water level method
变水头渗透计 Permeameter variable-head
变水头渗透试验计 Falling head permea- meter
水管变径接头 water pipe reducer
蓄水坑灌条件下的土壤入渗是在变水头作用下进行的。
Water infiltration of water storage pit irrigation is under varying-head conditions.
设计的变水头装置和透明接水容器，保证了粉土抗渗强度测定的可靠性和准确性。
The changing water level device and the transparent vessel insure the accuracy and dependability of impermeability intensity measuring.
本文对使用的方法进行了初步探讨，并讨论了变水头大流量标准装置的一些其它特性。
Finally, some other characteristics of the variable water head standard device for large flow rate have been dealt with and theoretically investigated.
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