... 引入三维实体创建工程图(Views) 工程图尺寸标注(Dimensioning) 视图和文字说明的定位操作(Positioning) ...
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自动给工程图标注尺寸 Autodimensioning the Drawing
常见的尺寸公差模型是对传统工程图尺寸标注的实现，缺少设计过程方面的理论支持。
Existing D & T models are more or less versions of dimensioning of conventional drawings, and should be based on a sound design process theory.
绘制机械工程图经常要标注零件的尺寸公差。
Drawing the mechanical engineering drawing usually need to mark the dimension tolerance of the parts.
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