機器
activity
asphalt
building
clay
compactor
construction
construction site
development
dig
dirt
dumper truck
dumping
engineer
engineering
equipment
excavation
foundation
freeway
heavy
highway
industrial
industry
loader
machinery
maintenance
metal
mover
process
quarrying
repair
repairing
road
roadworks
roller
soil
structure
technology
tools
tractor
transport
transportation
truck
unloading
vehicle
work
working
workplace