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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. M50 Joint Service General Purpose Mask - Wikipedia

    en.wikipedia.org/wiki/M50_joint_service_general...

    The lifetime ownership cost of the mask was reduced by 50% when compared with the M40 series mask due to a lower repair part count, all maintenance being completed at the operator and unit level and color coding of repair parts which decreased on-hand repair part inventory. [7] United States Marine Corps member is wearing a M50 mask

  4. Electronic color code - Wikipedia

    en.wikipedia.org/wiki/Electronic_color_code

    A 2.26 kΩ, 1%-precision resistor with 5 color bands (), from top, 2-2-6-1-1; the last two brown bands indicate the multiplier (×10) and the tolerance (1%).. An electronic color code or electronic colour code (see spelling differences) is used to indicate the values or ratings of electronic components, usually for resistors, but also for capacitors, inductors, diodes and others.

  5. Cyclone Mackey - Wikipedia

    en.wikipedia.org/wiki/Cyclone_Mackey

    Corbin James Massey (July 19, 1903 – December 30, 1979) was an American professional wrestler known under a number of ring names such as Cyclone Mackey, Ciclón McKey, La Maravilla Emmascarada, Mr. X, The Grey Mask and The Yellow Mask.

  6. Band mask - Wikipedia

    en.wikipedia.org/?title=Band_mask&redirect=no

    With possibilities: This is a redirect from a title that potentially could be expanded into a new article or other type of associated page such as a new template.The topic described by this title may be more detailed than is currently provided on the target page or in a section of that page.

  7. Mask (disambiguation) - Wikipedia

    en.wikipedia.org/wiki/Mask_(disambiguation)

    A mask is a covering worn on the face, or an object depicting a face. The N95 and FFP2 are standards for respirators , which are masks designed to protect people against harmful airborne particles in industry and in medical settings, including against tuberculosis .

  8. Hardmask - Wikipedia

    en.wikipedia.org/wiki/Hardmask

    Hardmask materials can be metal or dielectric. Silicon based masks such as silicon dioxide or silicon carbide are usually used for etching low-κ dielectrics. [3] However, SiOCH (carbon doped hydrogenated silicon oxide), a material used to insulate copper interconnects, [4] requires an etchant that attacks silicon compounds.

  9. Spectral mask - Wikipedia

    en.wikipedia.org/wiki/Spectral_mask

    In telecommunications, a spectral mask, also known as a channel mask or transmission mask, is a mathematically defined set of lines applied to the levels of radio (or optical) transmissions. The spectral mask is generally intended to reduce adjacent-channel interference by limiting excessive radiation at frequencies beyond the necessary bandwidth .

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