Show HN: My dad designed and built a ventilator prototype with a bicycle pumphttps://www.dropbox.com/s/d3sq2oq2u4rnxen/77503df8-c6dd-4d44-9fb7-bfa9e4c2255a.mp4?dl=0 by commonanatomy • 6 years ago 37 6 6 years agoDRdropbox.com