area
background
building
caution
clothing
construction
danger
ear
earplugs
engineering
equipment
factory
goggles
hat
hazard
head
health
hear
hearing
helmet
icon
illustration
industrial
industry
information
instructions
label
loud
mandatory
noise
notice
protect
protection
protective
risk
rules
safe
safety
security
sign
site
sound
symbol
warning
wear
work
worker
worn
zone