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![](picture/2009101612033899538.jpg)
fabric: soft non-woven cloth filter layer: activated carbon
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![](picture/2009101612041172978.jpg)
fabric: soft non-woven cloth filter layer: high efficient melt blown web exhalation valve
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![](picture/2009101612045248012.jpg)
fabric: soft non-woven cloth filter layer: activated carbon exhalation valve
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![](picture/2009101612052892942.jpg)
abric: disposable non-woven cloth, solid face mask three-layer structure
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