alert
area
attention
background
beware
blank
board
button
careful
caution
circle
construction
danger
dangerous
emergency
empty
example
frame
hazard
here
icon
illustration
industrial
industry
information
label
mandatory
message
model
notice
paper
pattern
post
poster
prevention
prohibition
safety
security
sign
signal
simple
space
square
sticker
stop
stripes
symbol
template
texture
triangle
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