機器
activity
agriculture
bucket
building
bulldozer
concrete
construction
development
dig
digger
dirt
ditch
earth
equipment
excavate
excavation
excavator
field
front
granite
gravel
growth
heavy
hydraulic
industrial
industry
loader
machinery
mine
mining
move
mover
occupation
planning
power
quarry
road
rock
scoop
shovel
site
slate
soil
stone
transportation
truck
vehicle
work
working
yellow