機器
action
backhoe
bucket
building
bulldozer
civil
construction
construction site
contractor
development
dig
digger
digging
dirt
dirtied
duty
earth
engineer
engineering
equipment
excavating
excavation
excavator
gravel
heavy
highway
industrial
industry
investment
land
loader
machinery
material
mining
moving
power
quarry
road
sand
scoop
shovel
shoveling
site
sky
tractor
truck
vehicle
work
yellow