機器
activity
asphalt
bituminous
builder
building
caution
cement
compactor
construction
danger
drive
engineer
engineering
equipment
hammer
heavy
highway
industrial
industry
jackhammer
job
laborer
machinery
maintenance
man
outdoor
pavement
paving
pile
pneumatic
renovation
repair
road
rock
route survey
safety
site
steel
street
survey
technology
tool
traffic
transportation
truck
vehicle
wheel
work
worker