residual air

residual air resistance

Air Voids

Air voids content

air voids of coarse aggregate

Design Air Voids

expected field initial air voids

field air voids

percent air voids

percentage of air voids

volume of air voids

Air Leakage Rate of Air Preheater

air to air heat recovery unit

air to air missile launching envelope

air to air system

arctic air [= arctic air mass]

continental air [= continental air mass]

main air port exhaust air

marine air [= marine air mass