Oxygen Mask 12
Oxygen Mask 12 :
Mask Retention Systems: Medical oxygen masks are held in place by medical personnel or the user by hand, or they may be fitted with a light weight elastic headband so the mask can be removed quickly. Full-face masks are secured by several straps. Tightly fitting oxygen masks are secured at four points by two head straps. Aviators masks are often equipped with quick don harnesses that allow those in pressurized aircraft to rapidly don the masks in emergencies. Military aviators oxygen masks are secured to flight helmets with quick-release systems
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