2 Results for "rpd641.top ð Ƽٺм õ ƮĿ ӵ ٸ ͳ"

Inspired by the snorkel mask repurposed for a ventilator, I added filter material instead to make some serious Personal Protection Equipment

A conventional P100 respirator upgraded for use as COVID-19 PPE by the addition of an intercom and a means of exhaled-air treatment