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General Category => General Discussion => Topic started by: TanjaSilve on December 07, 2024, 01:42:58 pm

Title: Medium Where Good Ideas Find You.
Post by: TanjaSilve 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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