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关注：1
2013-05-23 12:21
求翻译：空气中浓度超标时，佩戴自吸过滤式防毒面具（半面罩）是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
空气中浓度超标时，佩戴自吸过滤式防毒面具（半面罩）
问题补充： |
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2013-05-23 12:21:38
Concentration in air overweight, wearing self-absorption filter respirators (half mask)
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2013-05-23 12:23:18
concentrations in the air above the standard, when wearing self-suction filter-style gas mask (half-face mask)
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2013-05-23 12:24:58
In when air density exceeding the allowed figure, wears the self-absorption filtration type gas mask (half face guard)
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2013-05-23 12:26:38
When excessive concentration in the air, wearing a self-priming filter type respirators (half mask)
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2013-05-23 12:28:18
Concentration in air overweight, wearing self-absorption filter respirators (half mask)
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