In the design of noncircular chain drive, the key problem is the design of pitch line of noncircular chain wheel.

在非圆链传动的设计中，一个关键问题就是非圆链轮节曲线的设计。

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In the design of noncircular chain drive, the key problem is the design of pitch line of noncircular chain wheel.

在非圆链传动的设计中，一个关键问题就是非圆链轮节曲线的设计。

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