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  2. Elastomeric respirator - Wikipedia

    en.wikipedia.org/wiki/Elastomeric_respirator

    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. This reduces the resistance when the user is breathing out, and some find it makes the mask more comfortable. [2] It may also reduce inwards leakage. [10]

  3. Half-mask - Wikipedia

    en.wikipedia.org/wiki/Half-mask

    A half-mask is a mask that covers half the face. It may mean: a mask covering from below the eyes to below the chin a dust mask; a filtering facepiece respirator; an elastomeric respirator; a mask covering the eyes and perhaps the forehead and/or nose, but not the mouth. a half-face diving mask

  4. Neoprene - Wikipedia

    en.wikipedia.org/wiki/Neoprene

    Neoprene's burn point is around 260 °C (500 °F). [21] In its native state, neoprene is a very pliable rubber-like material with insulating properties similar to rubber or other solid plastics. Neoprene foam is used in many applications and is produced in either closed-cell or open-cell form.

  5. Respirator - Wikipedia

    en.wikipedia.org/wiki/Respirator

    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. [74]

  6. Mechanical filter (respirator) - Wikipedia

    en.wikipedia.org/wiki/Mechanical_filter_(respirator)

    Filtering facepieces are typically simple, light, single-piece, half-face masks and employ the first three mechanical filter mechanisms in the list above to remove particulates from the air stream. The most common of these is the white, disposable standard N95 variety; another type is the Surgical N95 mask.

  7. Tips pour in over 5,000 drone sightings. Reason to worry ...

    www.aol.com/tips-pour-over-5-000-131033198.html

    Editor's Note: This page is a summary of news on drone sightings for Tuesday, Dec. 17. For the latest news, view our story for Wednesday, Dec. 18. The FBI has received tips involving over 5,000 ...

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