The cycle frequency of jet fluid swing is half of that of tangential circle rotation.

相应切圆呈周期性旋转，射流摆动也具有周期性，该周期是切圆旋转周期的一半。

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The cycle frequency of jet fluid swing is half of that of tangential circle rotation.

相应切圆呈周期性旋转，射流摆动也具有周期性，该周期是切圆旋转周期的一半。

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