The calculating formula of ventilation flow were derived from the accumulation equation for eliminating radondaughters in the inlet flow with or without contamination.
由此方程导出了入风流未受污染和受污染两种情况下的排氡子体风量计算公式。
2
The migration of radon and its daughters is directional, and contravenes the law of the diffusion.
实验还发现，氡及其子体的分布具有明显的方向性，而与扩散规律相违背。
3
The main factors of radiation hazards in uranium mines are radioactive dust, radon and its daughters.