- broadside
- bromide refrigerant
- Brueckner expansion
- brush box
- brush lag
- bucking transformer
- Boyle temperature
- bra
- Braginskii notation
- braiding
- braking element
- branch point
- break
- breakdown potential
- breaking elongation
- breaking load
- breaking strength
- brine charging
- brine consumption
- brine cooler
- brine deposit
- brine drum
- brine freezer
- brine line
- brine pump
- brine refrigerant
- buffer stage
- bulb temperature
- bulk connector
- bundle conductor
- buoyancy
- Burgers circuit
- burner
- burnout
- burst transmission
- bus
- bus duct
- bushing transformer
- brine treatment
- Brownian movement
- brush discharge
- brush holder
- brush lead
- buchholz relay
- bulb
- bulk boiling
- bulk eraser
- bulk storage
- bulk transport
- bulkwave acoustooptics
- bunch cables
- busway
- butt welding
- butterfly capacitor
- butterfly damper
- butterfly valve
- buttonhook contact
- bypass air
- bypass condenser
- bypass damper
- bypass factor
- bypassed refrigerant
- bypassing duct
- C-n
- cable bridge
- cable coupler
- cable entry
- cable messenger
- cadmium lamp
- caesium cell
- cake ice
- californium
- call attempt
- call transfer
- calorific power
- can
- can lift
- canalization
- candoluminescence
- canonical coordinate
- Butler oscillator
- butt contacts
- butterfly catastrophe
- bypass circuit
- bypass injection
- bypassed air
- c battery
- cable adaptor
- cable bond
- cable complement
- cable equalizer
- cable shield
- cadmium test
- calculable
- calibration error
- calibrator
- call forwarding
- caloric value
- calorimetric measurement
- camera cable