機器
bucket wheel
coal
coal mine
construction
digging
dirt
earth
earthmoving
energy
engineering
environment
equipment
europe
excavation
excavator
factory
fossil
fuel
germany
gigantic
grass
heavy
inden
industrial
industry
iron
large
lignite coal
machinery
materials
metal
mine
mineral
openpit
oversized
overweight
pollution
power
progress
schaufelradbagger
tagebau
tagebau inden
technology
vehicle
work