機器
big
brown coal
browncoal
bucket excavator
bucket wheel
buckets
coal
coal mine
coal mining
concept
design
digger
dirty
earth
energy
environment
equipment
excavation
excavator
fossil fuel
fossilfuel
fuel
garzweiler
germany
giant
hambach
heavy
heavy equipment
industrial
industry
large
lignite
load
machinery
marl
metal
mine
mining industry
open pit
ore
power
quarry
site
steel
stone
technology
teeth
wheel
work