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
Build section and horizontal section
Cold Drawn Section Steel of Rectangular Section
Cutting section by section
enriching section rectifying section
positioning section by section
ratio of section height to section thickness