Building an O2 concentrator for welding and vacuum tube work

L: https://www.nickpoole.me/2024/06/01/building-an-oxikit-o2-concentrator-part-2/

C: https://news.ycombinator.com/item?id=40688403

posted on 2024.06.15 at 04:44:27 (c=1, p=3)