Long path differential optical absorption spectroscopy
Air Leakage Rate of Air Preheater
air to air heat recovery unit
air to air missile launching envelope
arctic air [= arctic air mass]
continental air [= continental air mass]
main air port exhaust air
marine air [= marine air mass
variable air volume (VAV) air conditioning system
variable air volume air conditioning system
integrated technologic system based on remote sensing spectrum and airborne radiometric gamma energy spectrum
(2+1)-dimensional dispersive long wave equation
(2+1)-dimensional dispersive long wave system with variable coefficient
1000 km long green corridor