其计算结果表明：在几次地震前均有清楚的形变前兆显示。

The calculated result indicated that precursor deformation had been exhibited before some earthquakes.

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本文就此进行了初步分析，认为强震前的预滑移可能产生这种长周期的形变波，它们对大震预报有一定意义。

In this paper we analyze these data and find that the deformation wave of long period comes from pre-movement before a strong earthquake.

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针对唐山等大地震前出现的“形变空区”现象，依据实验和理论对应变空区进行了探讨。

Based on the phenomena, which the deformation gap was observed before the Tangshan Great Earthquake, this paper discusses the strain gap on test and theory.

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