本体包括具有侧凹部分的面。
因此，在整个模具设计过程中，侧凹特征的识别必须在其他一切设计活动之前完成。
So, all the undercut features in a mold should be recognized first before the other design activities can be carried out.
实例测试表明，该侧凹特征识别方法可以有效地识别注塑产品中的侧凹特征，提高侧凹特征的识别效率。
The case study shows that the proposed method is available in recognizing the undercut features and improves the efficiency in undercut feature recognition.
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