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Air Sac , air sac air lock , air lock, compartment connecting two different environments, usually at different pressures, that enables personnel to transfer from one environment… Air Bag , Background
An air bag is an inflatable cushion designed to protect automobile occupants from serious injury in the case of a collision. The air bag i… United States Air Operations , World War II, U.S. Air Operations in: The Air War in Europe. U.S. air operations in the Mediterranean and Europe evolved into two distinct fields of… Ventilation , ventilation, process of supplying fresh air to an enclosed space and removing from it air contaminated by odors, gases, or smoke.
Proper ventilation… TRACHEA , tra·che·a / ˈtrākēə/ • n. (pl. -che·ae / -kēˌē/ or -che·as ) Anat. a large membranous tube reinforced by rings of cartilage, extending from the laryn…
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open air