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本文研究了地下水中He/Ar和N_2/Ar比值的变异,以寻找地震前兆变化的标志。文中所选取的井孔与井孔地质条件见图1和表1。
In this paper, the variation of He / Ar and N 2 / Ar ratios in groundwater is studied to find the sign of the change of earthquake precursors. The selected well borehole and geological conditions shown in Figure 1 and Table 1.