Gears on nonparallel, non-intersecting shafts also have pitch circles, but the rolling-pitch-circle concept is not valid.
非平行的齿轮，非交叉传动的轴也有节点，但不存在纯滚动节圆的概念。
Gears on nonparallel, non-intersecting shafts also have pitch circles, but the rolling-pitch-circle concept is not valid.
非平行的齿轮，非交叉传动的轴也有节点，但不存在纯滚动节圆的概念。
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