accident
activate
alarm
alert
background
box
break
button
caution
close up
control
danger
electric
emergency
equipment
evacuation
extinguish
fire
grey
handle
help
industrial
industry
object
office
panel
panic
press
prevent
protection
pull
push
red
safe
safety
save
security
sign
sound
stop
switch
symbol
system
technology
tool
wall
warn
warning
white