outflow from sluice hole 闸孔出流
sluice gate outflow 闸孔出流
outflow sluice
流出闸
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In fact, however, in the process of sluice opening, the outflow is unsteady flow.
其实闸门开启过程中的出闸水流属非恒定流。
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