新加坡是首个支持一带一路和亚投行的国家# Joke - 肚皮舞运动
l*o
1 楼
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.
For more details, check out:
http://geniusasian.com/no-sewing-cloth-diy-mask-filter-tight/
https://youtu.be/KhXBln0Wepg
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.
For more details, check out:
http://geniusasian.com/no-sewing-cloth-diy-mask-filter-tight/
https://youtu.be/KhXBln0Wepg
