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2. Elastomeric respirator - Wikipedia

   en.wikipedia.org/wiki/Elastomeric_respirator

   Workers are instructed to put their mask on and leave immediately to sound the alarm if they detect a leak. Other respirators may be used for making repairs to leaking equipment. [51] Elastomeric respirators may be worn in agriculture, [5]: fig.2–4 for instance when using agricultural chemicals, solvents, fish meal, silage, mold spores and dust.

3. NIOSH air filtration rating - Wikipedia

   en.wikipedia.org/wiki/NIOSH_air_filtration_rating

   During the COVID-19 pandemic, the mask and respirator market rapidly grew, along with counterfeit respirators. [1] NIOSH, on behalf of the Department of Health and Human Services, filed a trademark application on June 17, 2020, for various 42 CFR 84 trademarks, including the N95, allowing NIOSH to enforce rules on counterfeit masks outside of rules defined in 42 CFR 84.

4. 3M - Wikipedia

   en.wikipedia.org/wiki/3M

   The N95 respirator mask was developed by 3M and approved in 1972. [112] Due to its ability to filter viral particulates, its use was recommended during the COVID-19 pandemic but supply soon became short. [ 112 ]

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   We found 22 great Black Friday deals on sweaters from Walmart, Amazon, Old Navy. Your one-stop-shop for the best early Black Friday deals at Amazon, Walmart, Wayfair, Nordstrom and more.

6. The 11 best Black Friday deals you can shop before midnight - AOL

   www.aol.com/lifestyle/the-11-best-black-friday...

   The best Black Friday deals: Amazon, Walmart, Wayfair, Best Buy, Nordstrom and more. Related Articles. AOL. 25 hostess gifts that aren't a bottle of wine; AOL.

7. Respirator assigned protection factors - Wikipedia

   en.wikipedia.org/wiki/Respirator_Assigned...

   Example of measurement of efficiency of the respirator (in the workplace). Description: (1) personal sampling pump, (2) the cassette and the filter for determining the concentration (in the breathing zone), (3) the sampling line (from the breathing zone), (4) the cassette and the filter to determine the concentration (under a mask), and (5) the sampling line (from the mask).