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Commit a7a0bf5d authored by Camron Blackburn's avatar Camron Blackburn
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Update README.md

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# COVID-19 Filter Testing
## testing instrument
<img src="./cad_1.png" height="600">
<img src="./cad_1.png" height="500">
This filter efficency testing device is a blend of ASTM standards F2299, F2101, and the henderson apparatus detailed by Wilkes[^filterPerformance].
compressed air enters at the center of the device and first passes through a HEPA filter (a).
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