機器
big
blade
brown coal
browncoal
bucket
bucket excavator
bucket wheel
chunk
coal
coal mine
coal mining
construction
dig
digger
digging
earth
energy
environment
equipment
excavation
excavator
fossilfuel
fuel
ground
heavy
industrial
industry
iron
large
lignite
load
machinery
marl
metal
mine
minerals
mining industry
ore
power
quarry
site
steel
surface mine
tagebau
technology
teeth
tool
wheel
work