This may be due to the near position of the sliding mark, and the sliding mark may be moving due to the sliding mark, which is the sliding track along the right moving level. The movement of the sliding line can result in cracks and crevices of the soil layer. The shale layer has changed, and it also affects the dispersion capacity of radon gas, but remains higher than the level set by the World Health Organization (WHO) of no more than 300 Bq/m3 (WHO, 2009).
正在翻譯中..
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