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研究了几种不同矿物成分和孔隙液的土柱在压应力作用下，两端面间产生电位差的现象。该现象表明此电位差（或其增量）与应力（或其增量）成正比例，这种电位差被论证就是流动电位（差）。
The phenomenon of potential difference between two end faces under the action of compressive stress was studied for several soil columns with different mineral compositions and pore fluids. This phenomenon indicates that this potential difference (or its increment) is proportional to the stress (or its increment), which is demonstrated as the flow potential (difference).