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不用线缝的布口罩,没缝隙,可换过滤材料,5分钟DIY

(2020-05-27 14:28:25) 下一个

不用线缝的布口罩,没缝隙,可换过滤材料,5分钟DIY

Since this design seals the gaps that often result on the sides of ordinary cloth or surgical masks, it would be comparable to an N95 mask.

more details can be found here

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