Steady water surface profile of gradually varied flow can be calculated using either a steady flow approach or an unsteady flow approach.
使用计算机计算明渠恒定渐变流水面曲线有两种分法：恒定流方法和非恒定流方法。
Steady water surface profile of gradually varied flow can be calculated using either a steady flow approach or an unsteady flow approach.
使用计算机计算明渠恒定渐变流水面曲线有两种分法：恒定流方法和非恒定流方法。
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