機器
activity
backhoe
boring
bucket
building
bulldozer
concrete
construction
construction site
development
digging
dirt
dredger
dumper truck
earthmover
engineer
engineering
excavation
excavator
foundation
freeway
gravel
heavyduty
highway
highway construction
hydraulic
industrial
industry
loader
loading
machinery
mover
moving
process
road
scoop
soil
structure
sunlight
surveying
tractor
transport
transportation
vehicle
working
workplace