Final design scheme is confirmed after economic and technical analyse. Then, axial fan 's stage type, impeller diameter, hub ratio , specific speed and the number of blades are decided.

在进行经济技术性分析后，最终确定风机的设计方案，进而确定通风机适当的级型式、叶轮尺寸、轮毂比、转速和叶片数等基本参数。

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The technical characteristics and economic merit of indoor sound barrier was analyzed according to the design based on the fixed type and movable type barrier.

通过固定式及活动式声屏障的设计，分析了室内声屏障的技术特点和经济效益。

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Here offers a new, economic and effective way for the design and construction of the new type structure.

本文为该新型结构的设计和施工提供了一种新的经济有效的手段。

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