Self Contained Breathing Apparatus, or air-pack, worn by firefighters to protect against toxic fumes and smoke, or where the air has insufficient oxygen. Often incorrectly called "oxygen mask" by laypersons. These are typically open circuit style, with a supply of compressed air, where expired air is exhausted, rather than closed circuit where it i...
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Self Contained Breathing Apparatus
See Self-Contained Breathing Apparatus.
Self-Contained Breathing Apparatus