Water bottle Rule: how much the bottle contains water depends on its shortest wood.
水桶定律：一只水桶能装多少水，完全取决与它最短的那块木板。
According to the measured data of 67 years in Dujiangyan, the rule of water-diversion of Fish-mouth and Precious-bottle-neck is studied in this paper.
根据都江堰枢纽区67年的实测流量资料分析了都江堰鱼嘴和宝瓶口的分流规律。
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