河床演变规律 evolution law of river channel ; bed developing law ; evolution of riverbed ; bed evolution law 产业演变规律 industry evolving principle .
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the evolution of riverbed 河床演变规律
River section analysis is the foundation of riverbed evolution analysis.
河道断面分析是河床演变分析的基础。
The extreme hypotheses is common law followed the self-adjusting mechanism of alluvial channels in riverbed evolution presently.
冲积河流的自我调整作用所遵循的规律，目前在河床演变学中比较常用的是极值假说。
Evolution characteristics of riverbed in fluctuating backwater area.
变动回水区河床演变特性。
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