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  • Air-purifying respirators designed to prevent the wearer from inhaling chemical and/or biological agents or radioactive materials from the environment, either as airborne particulates, gases, or vapors. They do not offer protection from radiation. These respirators typically include a mask that includes two appropriate disposable filtering cartridges, one for particulates and another to absorb and/or neutralize the chemical or biological agent. Chemical and biological agent respirators are intended for long-term (e.g., 24 hours or more) use in highly contaminated areas.
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