本论文进行了非饱和土气态水迁移的理论研究，得到非饱和土中气态水迁移引起的含水量变化方程。
The thesis studies the theories of water vapor transfer in unsaturated soil, and gets the water contents equations of water vapor transfer in unsaturated soils.
用它测定空气中气氡(气土)子体浓度获得良好结果。
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。
It was successfully used to automatically determine the concentrations of radon and thoron daughters in air.
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