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关注：1
2013-05-23 12:21
求翻译：The first step in preparing the mask is developing the engineering drawing of the pattern in a scale 2-20 times larger. The larger drawing helps in improving the accuracy when it is reduced photographically to the actual size. The etching factor has to be taken into account while making the pattern.是什么意思？ 待解决
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- 离问题结束还有
The first step in preparing the mask is developing the engineering drawing of the pattern in a scale 2-20 times larger. The larger drawing helps in improving the accuracy when it is reduced photographically to the actual size. The etching factor has to be taken into account while making the pattern.
问题补充： |
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