In order to receive a certificate in this field, the student must learn how to create two-dimensional and three-dimensional drawings of mechanical objects using computer design equipment.

要获得此类专业的证书，学生必须能够利用电脑设计系统绘制二维和三维的机械产品草图。

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As he worked, the changes to his precise three-dimensional models were reflected instantly in the engineering and two-dimensional CAD files, the working drawings for the motorcycle's assembly.

FORBES: Easy Designer