【单选题】【消耗次数：1】
常见的凸轮轮曲线的做法包括（ ）
①
对心直动滚子从动件盘形凸轮廓线的绘制
②
对心直动尖底从动件盘型凸轮廓线的绘制
③
对心直动平底从动件盘形凸轮廓线的绘制
④
以上为正确答案
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