air - anil
- air
- air cleaner
- air consumption
- air cooling
- air drag
- air duct
- air fuel mixture
- air gas
- air gauge
- air jet gun
- air of working area
- air pipe
- air storage chamber
- air stream
- air-and-fuel mixture
- air-flue mixture
- air-surplus coefficient
- air-vapor mixture
- airand-fuel mixture
- aircraft motor spirit
- all wheel drive
- all-level sample
- all-purpose grease
- allowable load
- allowable stress
- alternate fuel
- alternate stress
- alumina
- ambient conditions
- ambient temperature
- American Automobile Association
- American Automobile Manufacturers Association
- American Chemistry Council
- American National Standards Institute
- American Petroleum Institute
- American Society for Testing and Materials
