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Rebreather Oxygen Mask
A type of oxygen mask used with a continuous flow oxygen system. Oxygen continuously flows into the bottom of the loose-fitting rebreather bag on the mask. The wearer of the mask exhales into the top of the bag. The fist air exhaled contains some oxygen, and this air goes into the bag fist. The last air to leave the lungs contains little oxygen, and it is forced out of the bag as the bag is filed with fresh oxygen. Each time the wearer of the mask inhales, the air fist exhaled, along with fresh oxygen, is taken into the lungs.
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