daily average flow 日平均流量
The 3600m-long tunnel has 4 lanes. Its average daily traffic flow is expected to reach 50000 vehicles.
武汉长江隧道全长3.6公里，双线4车道，预计日通行能力为5万辆。
Can solve water daily average calculation of the average water level and flow, the procedure was used in an area surrounded by law.
可求解水利计算中日平均水位和日平均流量，本程序采用的是面积包围法。
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