機器
activity
big
blue
borrow
bucket
build
building
bulldozer
construct
construction
contractor
development
dig
digger
dirt
earth
engineering
equipment
excavation
excavator
ground
heavy
horizontal
industrial
industry
job
large
loader
machinery
mine
mover
operator
power
push
sand
scoop
shovel
site
sky
soil
track
tractor
transport
vehicle
wheel
work
worker
working
yellow