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矿尘的危害性 | 2011-9-22 16:56:00
矿尘的危害性
    矿尘的危害性主要表现在以下4个方面:
    (1)污染工作场所,危害人体健康,引起职业病;
    (2)某些矿尘(如煤尘、硫化尘)在一定条件下可以爆炸;
    (3)加速机械磨损,缩短精密仪器使用寿命;
    (4)降低工作场所能见度,增加工伤事故的发生。
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Re:在漫画中识别身边的违章 | 2016-10-23 2:06:42
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Re:在漫画中识别身边的违章 | 2016-10-22 12:33:35
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Re:在漫画中识别身边的违章 | 2016-10-18 2:00:52
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Re:在漫画中识别身边的违章 | 2016-10-13 2:55:08
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Re:在漫画中识别身边的违章 | 2016-10-8 20:22:16
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原创 | 2016-9-30 16:02:11
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原创 | 2016-9-28 21:18:54
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原创 | 2016-9-6 21:44:36
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