機器
activity
backhoe
big
blade
blue
borrow
bucket
build
builder
bulldozer
construct
construction
contractor
development
dig
digger
dirt
earth
equipment
excavate
excavating
excavation
excavator
ground
heavy
hydraulic
industrial
industry
large
loader
machinery
metal
mine
mover
power
quarry
sand
scoop
shovel
site
sky
soil
track
tractor
transport
vehicle
work
working
yellow