機器
bagger
belt
big
browncoal
bucket
career
caterpillartrack
caterpillartread
coal
coalfield
coalmine
construction
conveyor
destruction
digging
energy
engine
excavation
excavator
garzweiler
gas
geology
industrial
industry
iron
lignite
load
machinery
metallurgy
mine
mineral
oil
openpit
ore
oredeposit
pit
pollution
power
powershovel
resources
rheinbraun
rock
rwe
shale
shovel
soil
transport
transportation
trench