本文对冰覆盖下的河道水流进行了区域划分，给出了区域分界面上的水流条件。
The paper divides regionally the flow under the ice cover and gives flow conditions of the regional boundary surface.
本文对冰覆盖下的河道水流进行了区域划分，给出了区域分界面上的水流条件。
The paper divides regionally the flow under the ice cover and gives flow conditions of the regional boundary surface.
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