贯穿流体膜厚度无压力梯度。
There is no pressure gradient through the thickness of the film.
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.
测试流体粘度的一种仪器，在实验中使流体在已知压力梯度或流速情况下流过已知直径的一段试管。
An instrument for measuring the viscosity of a fluid by passing the fluid at a known pressure gradient or velocity through a length of tubing of known diameter.
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