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![](picture/2009101611593297350.jpg)
fabric: soft non-woven cloth filter layer: activated carbon
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![](picture/2009101612002080772.jpg)
fabric: soft non-woven cloth filter layer: high efficient melt blown web exhalation valve
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![](picture/2009101612020271528.jpg)
fabric: soft non-woven cloth filter layer: activated carbon exhalation valve
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![](picture/2009101612025520964.jpg)
fabric: soft non-woven cloth filter layer: high efficient melt blown web
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