care
chain
climate
company
control
danger
emergency
experiment
factory
fighter
fighting
fire
flames
gas
gauge
global
heat
high
hot
hydrant
knob
lab
maintenance
nozzle
off
pipe
pipeline
pipes
plant
plumbing
pressure
prevent
prevention
pump
red
safety
system
test
testing
thirst
tube
tubes
union
valve
warming
watch
watchful
water
work