機器
above
activity
aerial
black
bucket
bulldozer
coal
construction
dig
digger
earth
energy
environment
equipment
excavation
excavator
extraction
field
fuel
geology
ground
heavy
huge
industrial
industry
land
large
loader
machinery
mine
mineral
open
pile
pit
power
production
quarry
rock
sand
scoop
shovel
soil
top
transportation
truck
vehicle
view
work
yellow