ground airport equipment 
Equipment and materials for preparing an aircraft for its next flight; this includes cleaning, performing checks, refueling and boarding.
air start unit
Vehicle that is equipped with an air compressor driven by a gas turbine; it pumps air into the aircraft’s jet engines to start them.
Truck that pumps fuel from underground tanks into the aircraft’s tanks.
Device that connects the tow tractor to the aircraft’s front landing gear.
Very heavy vehicle that pulls or pushes an aircraft onto the maneuvering area or the parking area.