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  2. 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.

  3. Mine Safety and Health Administration - Wikipedia

    en.wikipedia.org/wiki/Mine_Safety_and_Health...

    The Mine Safety and Health Administration (MSHA) (/ ˈ ɛ m ʃ ə /) is a large agency of the United States Department of Labor which administers the provisions of the Federal Mine Safety and Health Act of 1977 (Mine Act) to enforce compliance with mandatory safety and health standards as a means to eliminate fatal accidents, to reduce the frequency and severity of nonfatal accidents, to ...

  4. Measurement category - Wikipedia

    en.wikipedia.org/wiki/Measurement_category

    Schematic representation of measurement categories. Measurement category is a method of classification by the International Electrotechnical Commission (IEC) [1] of live electric circuits used in measurement and testing of installations and equipment, usually in the relation within a building (residential or industrial).

  5. Federal Mine Safety and Health Act of 1977 - Wikipedia

    en.wikipedia.org/wiki/Federal_Mine_Safety_and...

    The Federal Mine Safety and Health Act of 1977 (Public Law 95-164) amended the Coal Mine Safety and Health Act of 1969.It can be found in the United States Code under Title 30, Mineral Lands and Mining, Chapter 22, Mine Safety and Health.

  6. MSHA - Wikipedia

    en.wikipedia.org/wiki/MSHA

    The acronym MSHA can refer to: Maryland State Highway Administration, an agency of the Maryland Department of Transportation. Master of Science in Healthcare Administration, a graduate degree; Mine Safety and Health Administration, an agency of the United States Department of Labor; D-inositol-3-phosphate glycosyltransferase, an enzyme

  7. Gnome-Rhône 7K - Wikipedia

    en.wikipedia.org/wiki/Gnome-Rhône_7K

    The Gnome-Rhône 7K Titan Major was a seven-cylinder 370 hp (270 kW) air-cooled radial engine, that started life as an enlarged Gnome-Rhône 5K with two extra cylinders. Development [ edit ]