機器
abandoned
arm
art
broken
bucket
construction
degradation
dig
digger
digging
dingy
dirt
dirty
earth
empty
equipment
excavation
excavator
exploitation
gravel
ground
hole
industry
land
landscape
large
limestone
loader
loneliness
machinery
mine
mineral
open
outdoors
pit
quarry
resource
resting
road
rock
shovel
site
stone
strip
surface
vehicle
way
work
works