Along the alley before nine to find the world's hotels, the right side of the wall have to join a ladder leading to the roof of the apron.

沿胡同前行找到九世界旅馆，右边的墙上有一道梯子通往屋顶的停机坪。

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The test results show that the apron can reduce back flow at the dam toe, and the piers can obviously diminish river bed scouring near the scour resistant wall.

试验结果表明：护坦减轻了下游纵向围堰左侧坝趾处的回流淘刷，隔流墩明显减轻了防冲墙附近河床的冲刷，确保了坝基和下游纵向围堰的安全。

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