air receiver - anchorage loss
- air receiver
- air recirculation
- air refrigerating machine
- air register
- air regulating damper
- air relief cock
- air remuval equipment
- air renewal
- air renewal rate
- air requirement
- air route
- air sampler
- air sampling
- air seal
- air service
- air shaft
- air slaking
- air source heat pump
- air space
- air space ratio
- air spade
- air speed
- air spring
- air spring cushion
- air station
- air sterilization
- air storage
- air stratification
- air stream
- air stream operated damper
- air strip
- air supply
- air supply box
- air supply duct
- air supply envelop
- air supply envelope
- air supply nozzle
- air supply plant
- air supply plenum
- air supply unit