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Author Topic: Medium Where Good Ideas Find You.  (Read 30 times)

TanjaSilve

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Medium Where Good Ideas Find You.
« on: December 07, 2024, 01:42:58 pm »
Respirator's are measured by their efficiency at filtering particles of 0.3 microns and bigger (noting that the coronavirus is smaller than that).

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xiria

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Re: Medium Where Good Ideas Find You.
« Reply #1 on: April 30, 2025, 08:09:01 pm »
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