機器
above
aerial
big
black
coal
construction
deep
dig
digger
digging
dirt
dirty
dump
energy
equipment
excavation
extract
extraction
fossil
fuel
geology
heavy
huge
industrial
industry
land
large
machinery
manufacture
mine
miner
mineral
minerals
mining
nature
open
opencast
pit
power
production
quarry
rock
russia
scraper
soil
valley
winter
work
yellow