The two-filter method is chosen as the experimental method to detect radon concentrations by a FT-648 radon counter.
本文建立了氡浓度测量的双滤膜实验方法，使用FT- 648测氡仪实施氡测量。
The two-filter method is chosen as the experimental method to detect radon concentrations by a FT-648 radon counter.
本文建立了氡浓度测量的双滤膜实验方法，使用FT- 648测氡仪实施氡测量。
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