機器
big
black
brown
coal
construction
deep
energy
environment
environmental
excavator
extractive
fossil
fuel
gold
green
ground
industrial
industry
iron
landscape
large
lignite
metal
mine
mountain
north
open
opencast
ore
outcrop
pit
pollution
power
production
quarry
rock
sand
soft
station
stone
strip
surface
transport
transportation
truck
vehicle
warming
woman
work