alarm
alert
background
caution
checking
connection
control
danger
emergency
equipment
extinguish
extinguisher
fighting
fire
fire hydrant
firefighter
gauge
hazard
holding
human
industrial
industry
measurement
office
panel
person
pipeline
precaution
pressure
prevent
prevention
professional
protection
pump
red
safety
security
service
smoke
sprinkler
system
technicain
technology
valve
wall
warning
watercourse