summit time low tide time and flat time of electric usage
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
actual time over standard time
corrected retention time corrected retention time
Mining Action of Non-Equipoise Time After Time
peace time changing war time
Real time PCR real time polymerase chain reaction
1# 10000 m3 air separation unit