- axle shaft
- axle steel
- axle weight
- azimuth observation
- azimuthal projection
- B-splines
- babbit
- babbit bushing
- babbit metal
- babbited
- babbitting mandrel
- back azimuth
- automatic conveyor
- automatic gate
- automatic locking
- automatic sampling
- automatic stop
- automation
- automatization
- automotive engine
- autorotation
- axial soring
- axial strain
- axis label
- axis plane
- axle bolt
- azimuth effect
- badland
- baffle
- baffle separator
- baffled apron
- baffler
- bag conveyor
- baggage car
- baggage elevator
- bagger
- bail
- bailing
- bailing pulley
- bailing tube
- baked carbon
- balance
- balance crane
- balance crank
- balance gate
- balance indicator
- balance level
- balance lever
- balance mass
- balance staft
- balanced excavation
- balancing
- balancing acting
- balancing lever
- balancing reservoir
- balancing stand
- balata belt
- bald
- bale
- balking
- ball attachment
- ball bearing
- ball cage
- ball cock
- ball coupling
- ball cutter
- ball float
- ball governor
- ball joint
- ball lock
- ball lubricator
- ball nut
- ball pane
- ball peen
- ball pipe
- ball race
- ball seat
- ball socket
- ball stop
- ball stud
- ballast equipment
- ballast gravel
- ballast pit
- ballaster
- ballasting
- balling
- balling furnace
- ballooning
- band
- band chain
- band clutch
- band coupling
- band pulley
- band saw
- band wheel
- band-shaped
- bandage
- banded
- banded gneiss
- bander