The approximate Solution and curve fittings of critical depth of round and U-shaped section canal by applying an equivalent square coefficient method were presented in this paper.
本文应用等面积系数法提出了圆形和U形断面临界水深的一种直接计算公式。
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This paper introduces the basic concepts of insulating glass unit U values(heat transfer coefficient)and in GB/T22476 standard the basic conditions&mathods for calcuting glass unit U values.