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People usually cover mouths with a clothing collar or sleeves unconscious. When they encounter with fire, dust, poisonous gas, and peculiar smell, etc. This applique can filter the air, including filter layer and the support layer.The design is different from mask putting on the ear, which can stick on clothes, can also being removed, and be with people like peas and carrots.Internal filter cotton is in the shape of “Z”，Chinese character. On the premiseof basic size, it can extend area of different sizes, and adapt to different disaster victims.
Dingxi Teachers College