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最后又介绍了龙口平均流速的理论计算方法。
The theoretical computation of average flow velocity in the gap also is introduced.
较总流量分析法，仅能给出明渠断面平均流速有所改进。
There is improvement as compared with the method of total flow which only gives the average velocity of transverse profile of open channel.
利用速度剖面公式计算的垂线平均流速场与实测值符合较好。
The dimensionless velocity-profile formula fits not only the depth average velocity profile but also velocity profile of each layer along depth.
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