- blocking screw
- blocksize
- blood
- blood plaque
- blookwood
- bloom shears
- blooming
- blooming roll
- blooming stand
- bloop lamp
- blooping patch
- blot
- blotter
- blotter press
- blow cock
- blow gun
- blow pipe
- blow torch
- blow-out
- blowback
- blowdown drum
- blower chamber
- blower grid
- blowing fan
- blowing off
- blowing sand
- blowing well
- blown glass
- blowoff cock
- blowout
- blowout magnet
- blue
- blue gas
- blue phosphor
- blueprint
- blues
- bluff-bowed
- blunt
- blunted conduit
- blur
- blurred
- blurt
- blushing
- board felt
- board lining
- boarding
- boarding joist
- boat
- boat scaffold
- boat tank
- bob up
- bobbin core
- bod
- body bolster
- body cap
- body dimensions
- body drag
- body maker
- body matter
- body polish
- body type
- bodying
- bog
- bog iron
- bog soil
- boggy soil
- boghead coal
- bogie furnace
- bogie spring
- boil down
- boil-off
- boiled oil
- boiler capacity
- boiler coal
- boiler end
- boiler front
- boiler furnace
- boiler jacket
- boiler jacketing
- boiler power
- boiler shell
- boiler smith
- boiler water
- boiler weld
- boiling
- boiling bed
- boiling pan
- boiling pressure
- boiling water
- bold
- bold italic
- bold net
- bolide
- bolometric
- bolt joint
- bolt thread
- bolt type
- bolted joint
- bolthead
- bolting closure