在机械设计中，CAD技术的应用加快了设计和绘图速度。
In the mechanical design, the application of CAD technology has accelerated the design and the drawing speed.
三维实体造型，是计算机辅助设计在机械设计领域的重要应用。
D solid modeling is the important application of Computer Aided design in the field of mechanical design.
在机械设计中，装配尺寸链的组成环公差，一般是采用等公差法或等精度法来确定。
During machine design, tolerance of unit ring in assembly dimension chain is usually determined by using either equal tolerance or equal accuracy method.
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