展开法
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outspread means
延伸的意思
以上为机器翻译结果，长、整句建议使用 人工翻译 。
By means of computer, the part's outspread drawings were protracted and then changed into language before the outspread curves were processed with numerical-controlled machine tool.
利用计算机绘制零件的展开图，然后转换成机器代码，通过线切割等数控机床对展开曲线进行加工。
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