| http://www.w3.org/ns/prov#value | - The third valve assembly 420 functions as an inhalation valve in that the valve moves between an open position and a closed position depending upon whether the patient is inhaling or exhaling.The third valve assembly 420 includes a valve element 422 that can be any number of different types of valve structures so long as they function in the intended manner and provide the desired results.
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