Existing D & T models are more or less versions of dimensioning of conventional drawings, and should be based on a sound design process theory.

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。

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Existing D & T models are more or less versions of dimensioning of conventional drawings, and should be based on a sound design process theory.

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。

youdao