alarm
alert
attention
beware
blue
caution
circle
clean
construction
danger
dangerous
energy
exclamation
factory
hands
hazard
healthcare
important
indicator
industrial
information
iso
label
mandatory
manufacturing
mark
message
mistake
notice
operation
plate
pollution
power
precaution
problem
professional
protection
risk
rules
safety
sanitizing
science
sign
soap
symbol
traffic
vector design
warning
washing
water
work
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