A radon proof hydrous paint could well avoid the perniciousness of radon. The results of experiment and...
本文分析了试验结果，探讨了防氡涂料的机理。
Following introduction on status of urban road traffic noise and its perniciousness, recent progresses in urban traffic noise assessment were browsed.
在分析城市道路交通噪声现状的主要危害的基础上，较全面介绍了国内外城市道路交通噪声评价方法的最新进展。
This paper presents the producing cause of different unfavourable flow conditions in the outlet area of approach channel for ship gate and its perniciousness.
阐述了水利枢纽船闸引航道口门区各种不利流态产生的原因，及其危害性，和提出了改善的措施。
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