dust generation during drilling in coal, limestone and iron 的翻译是：什么意思？中文翻译英文，英文翻译中文，怎么说？-青云在线翻译网

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匿名	关注：1 2013-05-23 12:21 求翻译：dust generation during drilling in coal, limestone and iron ore which reveals that air borne dust generated是什么意思？待解决悬赏分：1 - 离问题结束还有 dust generation during drilling in coal, limestone and iron ore which reveals that air borne dust generated 问题补充：

匿名	2013-05-23 12:21:38

匿名	2013-05-23 12:23:18

匿名	2013-05-23 12:24:58

匿名	2013-05-23 12:26:38

匿名	2013-05-23 12:28:18

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求翻译：dust generation during drilling in coal, limestone and iron ore which reveals that air borne dust generated是什么意思？