Jul. 5th, 2023

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Jul. 5th, 2023 11:15 am
jenk: Faye (Default)
 The CDC did some testing on DIY air filter units, including CR Boxes, with diagrams of how to build them. https://blogs.cdc.gov/niosh-science-blog/2023/02/03/diy-filtration/

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jenk: Faye (Default)
jenk

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