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Antifreezing mask / Mask

Antifreezing mask

By adding an inner layer of the mask and using a one-way breathing valve to export the exhaled moisture from both sides, the problem that the exhaled moisture causes the mask to freeze when wearing the mask for a long time in cold temperature is solved.

University

陕西科技大学

陕西科技大学
西安, China

小虎 方,
陕西科技大学