機器
anthracite
black
brown
coal
concept
conveyor
dark
dirty
dungeon
energy
engineering
equipment
excavator
exploitation
factory
fuel
geology
guido
heavy industry
horizontal
illuminated
indoors
industrial
industry
longwall
machinery
material
mine
mineral
mining
modern
new
pit
poland
power
raw
rock
science
symbol
tunnel
underground
wheel
workings