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Firefighter tests mask safety re oxygen/carbon dioxide levels with multiple styles
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نشرت في 18 Feb 2021 / في غير الربحية والنشاط
In just a couple of breaths, breathing through a mask set's alarm off for decreased oxygen/increased carbon dioxide. Using a pulse oximeter also finds a raised heart beat.
Found on Rumble: https://rumble.com/vbb6qb-fire....fighter-tests-mask-s
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