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.
传统的平行轴外啮合斜齿轮在啮合传动过程中，两齿轮的转动方向是相反的。
During traditional helical gears of parallel axle with external engagement engage, the direction of rotation is converse.
而交错轴斜齿轮传动由于其可以传递既不平行又不相交的两轴之间的运动和动力而被广泛地应用。
And the transmission of cross helical gear can transmit because of their sport of crossing two axles and power widely application neither parallel nor intersect.
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