这种仪器在设计上，采用了由大到小的逐渐变化的水压梯度，使渗透过程更符合于田间实际情况。此外，它还能自动记录渗透的全过程。

The meter could record automatically the whole process of penetration which was fully reflected on marked scales in accordance with change of water pressure in the field.

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构造附加静水压力梯度是流体及油气长距离水平运移的主要原因。

The gradient of the tectonic additional hydrostatic pressure is the main cause of the long-distance migration of the fluid, oil and gas.

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