air-flow metering unit

metering unit

metering accuracy

bleed-off metering system

fuel pump metering mechanism

main metering carburetor system

metering

metering check valve

metering jet

metering orifice

metering pin

metering valve

fuel-metering

fuel flow control unit

air traffic flow management (ATFM)

air-flow indicator

Main Air Traffic Flow Management Centre (MATFMC)

air flow

air flow duct

corrected air flow

ram-air flow

air flow rate

battery coolant unit / battery-coolant unit (BCU)

gear reduction unit / gear-reduction unit

position and navigation unit / position navigation unit (PNU)

pinch (a unit) out of a large unit

aerial refueling / air refueling / in-flight refueling (IFR) / air-to-air refueling (AAR)

air combat capable helicopter / air-to-air capable helicopter

air support field pack, field pack air support, airborne / para (air support) / Pathfinder Bergen

air assault infantry unit

air defense fire unit

air filtration unit

Special Operations Air Tasks Unit (SOATU)