Application of research produce of similarity theory can study complex phenomena by simple model experiment.
应用相似论的研究成果，能够通过简单的模型试验去研究复杂的现象。
By experiment, for the effect of fan expending Angle to noise and efficiency study.
通过实验研究离心风机蜗壳扩张角对风机噪声及效率的影响。
By experiment, for the effect of fan expending Angle to noise and efficiency study.
通过实验研究离心风机蜗壳扩张角对风机噪声及效率的影响。
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