筛网4*4 是什么单位？ -仪器网

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筛网4*4 是什么单位？

英语行天下 2015-08-03 08:45:18 402 浏览

才疏学浅，网格单位是什么

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後知後觉36 2015-08-04 00:00:00

就是说筛孔的尺寸是4mm*4mm。

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