... 预旋转，预转动：pre-swirl 预旋;预旋度：prerotation 预旋(气流的)，进气预旋：entry spin ...
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... prerinse预冲洗 prerotation预转 prerun预运行 ...
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prerotation vane 预旋叶片
prerotation inflow 预旋流
prerotation mechanism 预旋机理
air intake prerotation 进气预旋
tyre prerotation device 机轮颈转装置
incoming flow prerotation 来流预旋
This paper introduces the main energy saving technologies of centrifugal pump. And the author proposes a new energy saving technology which is called prerotation regulated by the inlet guide vane.
本文介绍了离心泵节能的主要技术，并提出了前置导叶预旋调节的节能技术。
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