Methods By using the negative high voltage exhaled thoron progeny measurement system.
方法采用负高压呼出气中子体测定装置。
It was successfully used to automatically determine the concentrations of radon and thoron daughters in air.
用它测定空气中气氡(气土)子体浓度获得良好结果。
The indoor thoron concentration in some areas and some kind of houses is higher, the study in this field should be strengthened.
我国有些地区和某些类型住房中钍射气浓度较高，有必要加强这一问题的研究。
Apart from the lower uranium concentration in kidney and higher thoron concentration in lung, the related other values are roughly similar with those reported abroad.
与国外相比，除了肾铀浓度明显偏低和肺钍浓度偏高外，其他数值基本相当。
Method By using high sensitive negative voltage exhaled thoron progeny collection and measurement system, the thorium lung burdens of each dust exposed miner was obtained.
方法用高灵敏度负高压人呼出气中钍射气子体收集测量系统对每名被检矿工测定其肺内钍的沉积量。
Method By using high sensitive negative voltage exhaled thoron progeny collection and measurement system, the thorium lung burdens of each dust exposed miner was obtained.
方法用高灵敏度负高压人呼出气中钍射气子体收集测量系统对每名被检矿工测定其肺内钍的沉积量。
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