n.溢洪道；泄洪道
The importance of a safe spillway cannot be overemphasized. 安全溢洪道的重要性无论怎样强调也不会过分。
It is a few projects of crest spillway of rock-fill dam at home and abroad at present. 摘要目前国内外有关堆石坝坝顶溢洪道的工程实例较少，对其结构设计理论的研究也不多，仅有少量的实验。
