alarm
alert
arc
area
attention
background
caution
construction
damage
danger
dangerous
design
electric
electrical
face
factory
fire
flammable
flash
flat
gas
hazard
icon
illustration
industrial
industry
information
isolated
label
manufacturing
mask
material
notice
pictogram
prohibition
protection
protective
risk
safety
security
sign
spark
sticker
symbol
warning
weld
welder
welding
zone