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以某电动铲运机中采用的电缆卷筒装置为例，介绍了如何进行计算机辅助设计零件尺寸的方法、步骤，借以达到提高产品的质量、缩短产品开发周期的目的。
Taking a cable reel device used in an electric scraper as an example, this paper introduces how to carry out computer aided design of parts’ dimensions and steps so as to improve product quality and shorten product development cycle.