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关注:1
2013-05-23 12:21
求翻译: 通风不良时,戴呼吸防护器具。是什么意思?![]() ![]() 通风不良时,戴呼吸防护器具。
问题补充: |
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2013-05-23 12:21:38
ventilation, wear respiratory protective equipment.
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2013-05-23 12:23:18
* * * * poor ventilation, when wearing respiratory protective equipment.
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2013-05-23 12:24:58
When ventilates not not good, wears the breath protection appliance.
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2013-05-23 12:26:38
When a poorly ventilated, wear respiratory protection devices.
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2013-05-23 12:28:18
ventilation, wear respiratory protective equipment.
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