機器
environmental
bagger
belt
big
browncoal
bucket
coal
coal mine
construction
conveyor
cultivator
destruction
digger
digging
earth
energy
environment
excavation
excavator
geology
germany
hambach
industrial
industry
landscape
lignite
machinery
mine
opencast
openpit
ore
oredeposit
pit
pollution
power
quarry
rock
rwe
shale
shovel
soil
steel
technology
transport
transportation
transporter
trencher
wheel
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