To improve the measurement accuracy of the radionuclide activity by verified the medical activity meter of user in order to reduce unnecessary exposure.
目的：通过对医用活度计的检验，改善放射性核素活度的测量准确性，减少不必要的照射。
The measured activity concentrations for these natural radionuclide were compared with the reported data for other countries.
这些天然放射性核素的活度浓度与其他国家报告的数据进行比较。
The measured activity concentrations for these natural radionuclide were compared with the reported data for other countries.
这些天然放射性核素的活度浓度与其他国家报告的数据进行比较。
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