box
building
cabinet
chain
connect
connector
corridor
danger
doorway
emergency
equipment
extinguish
extinguisher
faucet
fighter
fire
firefighter
fireman
high
hose
hosepipe
hydrant
industrial
metal
minimal
nozzle
pipe
piping
plug
plumbing
power
pressure
prevention
protect
protection
pump
reel
rescue
roll
safe
safety
security
stairwell
symbol
system
valve
walk way
wall
water
wet