生产性粉尘中游离的二氧化硅含量,%
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工人接触粉尘时间肺总通气量(L/日·人)
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生产性粉尘浓度超标倍数
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0
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~1
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~2
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~4
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~8
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~16
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~32
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~64
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<10
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~4000
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~6000
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>6000
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0
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Ⅰ
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Ⅱ
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Ⅲ
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Ⅳ
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||||
>10~40
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~4000
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~6000
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>6000
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>40~70
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~4000
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~6000
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>6000
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>70
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~4000
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~6000
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>6000
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