问答题

轮廓要素是指构成零件轮廓的直接触及的点、线、面;中心要素是指零件中触及但客观存在的点、线、面

答案： - 轮廓要素：这些是构成零件外形的直接接触点、线、面，它们定义了零件的外形和尺寸。例如，一个矩形零件的四条边和四个角点都...

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