機器
anthracite
australia
black
bucket
carrier
coal
crane
dig
digger
dirty
dust
earth
energy
equipment
excavator
extraction
factory
fog
formation
fuel
geology
gold
grab
huge
hydraulic
industry
iron
large
loader
mine
miner
mineral
mining
moving
open
operations
overburden
resourse
rock
russia
shovel
soil
truck
wealth
wheels
work
yellow