Helical rotor is the most important part of rotorflowmeter, 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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The analysis is offered to the problems existing in the aspects of structure design, processing assembly quality and measurement range of rotorflow-meter used in Bonan oilfield for many years.