機器
big
black
carbon
coal
conveyor
conveyor belt
digger
digging
earth
ecology
energy
environment
environmental
equipment
excavator
exploitation
fossil
fuel
giant
global
ground
heap
heavy
huge
industrial
industry
lignite
load
machinery
material
mine
mineral
mining
plant
power
raw
reclaimer
stacker
steel
supply
surface
technology
transport
transporter
tree
vehicle
wheel
work
working