The research on design method and test for low specific speed impeller are recounted specifically. It is of very importance to further develop and use in low-flow chemical centrifugal pumps.
着重叙述了低比转数叶轮的设计方法、试验研究，对进一步开发、应用小流量化工用离心泵具有重要指导意义。
Under the background, this thesis sets to research on the communication space of college teaching building, and intents to educe the design method and the design principle.
本文就是在这样的背景下，对高等学校教学建筑交往空间的设计方法展开研究，力求得出相关的设计方法和设计原则。
Because of the increasing sharp competition of market, people pay more and more attention to the research on the product cost estimating at the stage of design and the design method of reducing cost.
日益加剧的市场竞争促使人们愈来愈重视对设计阶段的产品成本估算和降低产品成本的设计方法的研究。
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