In this paper we deduce the circular equivalent of the flat-circular on the basis of equal flow rate and resistance to flow in both ducts.
本文提出其以流量为准的当量直径公式，以利于系统计算。
In this paper we deduce the circular equivalent of the flat-circular on the basis of equal flow rate and resistance to flow in both ducts.
本文提出其以流量为准的当量直径公式，以利于系统计算。
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