你重复但旋转另一边。
该手法对小关节是安全、有效的，但旋转角度不宜过大。
The manipulation was safe and effective for facet joints, but the rotatory levels of lumbar should not be too much during manipulation.
采用扇形不完全齿轮传动送料轮轴上的齿轮来完成，上、下滚轮的转速相同，但旋转方向相反。
The gear wheel is used to complete the rotation speed of the upper and lower rollers, but the rotation direction is opposite.
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