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| 基于模型的定义 (一种产品设计表现技术，用三维计算机数模来表达对产品的全部定义，包括基准、尺寸、公差、注释、旗注、材料等信息，MBD是DPD 的形式之一) | |||
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model based definition : 2 phrases in 1 subject |
| Aviation | 2 |
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