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Air Admittance Valve
in NASA
Aerospace Audio- Visual
in NASA
120992120993
Similar to AAV
A/F - Air-to-Fuel Ratio
A/FM - Air/Firing Mechanism
A/G - Air to Ground
A/L - AutoLand
A/L - AirLock
A/L - Approach and Landing
AA - Astronomical Applications
View all in NASA