機器
are
asphalt
barrier
building
bulldozer
city
compactor
construction
danger
earth
engineering
equipment
excavator
heavy
highway
illustration
industrial
industry
loader
machinery
maintenance
orange
pavement
paving
people
repair
road
roadwork
roadworks
safety
sign
site
street
symbol
technology
traffic
transport
transportation
under
vehicle
warning
white
work
worker