攔河堰下游軟弱岩石沖刷坑形狀與深度分析

攔河堰下游軟弱岩石沖刷坑形狀與深度分析

165 Pages · 2011 · 17.21 MB · Chinese
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“ Never let your sense of morals prevent you from doing what is right. ” ― Isaac Asimov
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