Helical rotor is the most important part of rotor flow meter, and its section shape is normally formed by involute and cycloid.

螺旋转子是转子流量仪表中的心脏零部件，其截面形状一般由渐开线和摆线组合而成。

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It comes just six months after Norway promised the world's largest wind turbine, with its 145 meter rotor diameter, to be built and contributing to the country's power grid by 2011.

这发生在挪威承诺将要建设具有145米转子直径的、世界上最大的风力涡轮机，并且在2011年前为该国电网作出贡献之后仅仅六个月。

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Practical problems concerning direct current measurement in very shallow water including the dynamic equation and performance of a rotor type current meter are discussed in this paper.

本文简要介绍了超浅海水域中直接测流的实际问题，讨论了海流计的动态方程及其特性。

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Dr. James Friend, senior lecturer in the Department of Mechanical Engineering at Monash University in Australia, is developing a nanobot propelled by a tiny rotor motor measuring about five-millionths of a meter.

CNN: Nanobots get to the heart of the matter