accident
builder
caution
civil engineering
clipart
construction
danger
disaster prevention
employee
engineer
evacuation
evacuation training
field
flat
general contractor
green cross
hardhat
hat
head
helmet
icon
illustration
industrial
industry
isolated
item
job
manufacture
object
one
prevention
protective
protective cap
protective gear
safety
safety first
simple
single
tool
training
uniform
white
work
worker