combustion air metering hole
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
A shrinkage method combining with medium-length hole and shallow hole
hole by hole blasting technique
hole by hole detonating
hole by hole initiating
hole by hole initiation