background
box
building
cabinet
danger
dirty
emergency
equipment
extinguish
extinguisher
fire
firefighter
glass
high
hose
hoses
hot
hydrant
industrial
inside
isolated
metal
new
object
old
outside
packed
pipe
plug
power
protect
protection
red
rescue
safety
security
sign
space
spray
steel
symbol
system
technology
tool
valve
wall
water
white