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  2. File:Understanding the difference between surgical masks and ...

    en.wikipedia.org/wiki/File:Understanding_the...

    This image is a work of the National Institute for Occupational Safety and Health, part of the Centers for Disease Control and Prevention in the United States Department of Health and Human Services, taken or made as part of an employee's official duties.

  3. Photomask - Wikipedia

    en.wikipedia.org/wiki/Photomask

    In the case of a photomask, there is a one-to-one correspondence between the mask pattern and the wafer pattern. The mask covered the entire surface of the wafer which was exposed in its entirety in one shot. This was the standard for the 1:1 mask aligners that were succeeded by steppers and scanners with reduction optics. [7]

  4. Self-contained breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/Self-contained_breathing...

    An open circuit SCBA typically has three main components: a high-pressure gas storage cylinder, (e.g., 2,216 to 5,500 psi (15,280 to 37,920 kPa), about 150 to 374 atmospheres), a pressure regulator, and a respiratory interface, which may be a mouthpiece, half mask or full-face mask, assembled and mounted on a framed carrying harness. [2]

  5. European respirator standards - Wikipedia

    en.wikipedia.org/wiki/European_respirator_standards

    The European respirator standards refer to the filtering classification by EN 149, EN 14683, and EN 143, all European standards of testing and marking requirements for respirators. [1] FFP standard masks (where FFP stands for filtering facepiece) [ 2 ] cover the nose, mouth and chin and may have inhalation and/or exhalation valves.

  6. Elastomeric respirator - Wikipedia

    en.wikipedia.org/wiki/Elastomeric_respirator

    mouth-bit respirators, which fit in the mouth with the nose pinched shut (escape only) quarter-mask or orinasal mask, covering the mouth and nose only; half-mask, from below the eyes to below the chin; fullface mask, from above the eyes to below the chin; Some elastomeric masks include one-way valves to let exhaled air out unfiltered.

  7. Joint Service General Purpose Mask M-50/M-51 - Wikipedia

    en.wikipedia.org/wiki/Joint_Service_General...

    It is an above-the-neck, chemical-biological (CB) respirator that protects against battlefield concentrations of CB agents, toxins, toxic industrial materials, and radioactive particulate matter. The M50/51 masks replace the M40 field protective mask and M42, the MCU-2/P series masks, and the M45 of the Land Warrior Program. [2]

  8. Bag valve mask - Wikipedia

    en.wikipedia.org/wiki/Bag_valve_mask

    Bag valve mask. Part 1 is the flexible mask to seal over the patients face, part 2 has a filter and valve to prevent backflow into the bag (prevents patient deprivation and bag contamination) and part 3 is the soft bag element which is squeezed to expel air to the patient

  9. FM12 NBC Respirator - Wikipedia

    en.wikipedia.org/wiki/FM12_NBC_Respirator

    The FM12 also has an inner mask to prevent fogging of the lenses. The 'ridge' present around the edge of the S10 is absent from the FM12. The main noticeable difference between the FM12 and the S10 is the ability of some FM12's to mount two filters to the mask simultaneously, as was done by the SBS in the Gulf War. When only one filter is ...

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