(Table A2) Raw data of the down-core radionuclide activity of 137Cs, 210Pb an...
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999 = denotes the samples, in which the activity counts were below detection limit.
999 代表活动计数低于检测限(detection limit)的样本。

999 = denotes the samples, in which the activity counts were below detection limit.
999 代表活动计数低于检测限(detection limit)的样本。