機器
air
air pollution
big
blue
brown
brown coal
bucket excavator
bucketwheel excavator
carbon dioxide
co2
coal
coal industry
conveyor belt
day
day mine
digging
environment
environmental damage
equipment
excavator
fossil fuel
fuel
fuel and power generation
generation
global
global warming
high
horizontal
illuminated
industrial
industry
large
lignite
lignite industry
line
long exposure
mine
night
night shot
pit mine
pollution
power
rotary excavator
sky
soil
steel
surface mine
tall
warming
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