目的：从颈椎定点旋转手法旋转中心点的角度分析旋转手法的作用途径。
OBJECTIVE:To discuss the action mechanism of rotatory technique based on the central rotatory point of cervical vertebra fixed-point rotatory technique.
柱上的铰链连接能让整座建筑倾斜并围绕中心点旋转，建筑随着居民的重量转移。
A hinge connected to the column allowed the entire piece to tilt and rotate around a central point as the weight of its inhabitants shifted.
出力轴在间歇分度时，可设定在旋转行程的中心点上停动，也可设定旋转角度和升高能力。
Output shaft when the swing set in the center of rotation on the trip-down, design may also need to set rotation angles and movements itinerary.
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