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。
The cycle frequency of jet fluid swing is half of that of tangential circle rotation.
这种往复运动也叫摆动或周期性运动。可以有很多例子证实；
Such a repetitive motion is said to be oscillatory or periodic. Many other examples might be cited;
这种往复运动也叫摆动或周期性运动。可以有很多例子证实；
Such a repetitive motion is said to be oscillatory or periodic. Many other examples might be cited;
应用推荐