機器
agriculture
bucket
building
bulldozer
close
construction
dig
digger
dirt
dirty
dust
earth
equipment
excavation
excavator
filth
ground
heavy
horizontal
hydraulic
industrial
industry
loader
loam
machinery
mining
mover
mud
outdoors
pair
scoop
shovel
side
site
smoke
steam
sunlight
trace
track
tractor
transportation
two
vehicle
wheel
whell
work
worker
worksite
yellow