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2. 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.

3. N95 respirator - Wikipedia

   en.wikipedia.org/wiki/N95_respirator

   An N95 respirator is a disposable filtering facepiece respirator or reusable elastomeric respirator filter that meets the U.S. National Institute for Occupational Safety and Health (NIOSH) N95 standard of air filtration, filtering at least 95% of airborne particles that have a mass median aerodynamic diameter of 0.3 micrometers under 42 CFR 84, effective July 10, 1995.

4. Usage of personal protective equipment - Wikipedia

   en.wikipedia.org/wiki/Usage_of_personal...

   A gas mask is worn over the face to protect the wearer from inhaling "airborne pollutants" and toxic gases. The mask forms a sealed cover over the nose and mouth, but may also cover the eyes and other vulnerable soft tissues of the face. Airborne toxic materials may be gaseous or particulate. Many gas masks include protection from both types.

5. Target, Walmart and 5 More Retailers Requiring Masks as Delta ...

   www.aol.com/retailers-requiring-masks-delta...

   Home Depot said in a statement that as the Delta variant of COVID-19 continues to spread throughout the U.S., “beginning August 2, we’ll require all associates, contractors and vendors to wear ...

6. 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.

7. More businesses implement required mask policies: Home Depot ...

   www.aol.com/news/more-businesses-implement...

   More businesses are joining Walmart, Target, Whole Foods, and more companies in implementing required mask policies to protect employees and customers.