在一条空气流通管道内平分有四个出口，在管道流量和流速已知的情况下如何做到四条全开的出风口流量相同。？ 知乎 Sketch Coloring Page

在一条空气流通管道内平分有四个出口，在管道流量和流速已知的情况下如何做到四条全开的出风口流量相同。？ 知乎 Template

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