environment radon content 环境氡浓度
radon content in soil 土壤氡含量
anomaly of water radon content 水氡异常
digital radon-content observation 数字化氡
anomalous radon content in water [地震] 水氡异常
The earthquakes occurred during radon content dropping.
地震发生在氡值下降的过程中。
The emanation scintillation method to determine the radon content is the principal way.
射气闪烁法是测氧的主要方法。
Results of the experiment show that rock rupture may be considered as one of the causes of variation of Radon content before the occurrence of an earthquake.
实验结果表明，可以认为岩石破裂是引起地震之前氡含量异常的原因之一。
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