Genetic engineering engineering
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
engineering design China Communications First Design Institute of Navigation Engineering
bias between the mass center and siffness center
center to center communications
center to center distance