機器
big
black
brown
bucket
coal
construction
crane
dig
digger
earth
energy
environment
equipment
excavation
excavator
fossil
fuel
garzweiler
giant
global
ground
heavy
huge
industrial
industry
large
load
loader
machinery
metal
mine
minerals
mining
open
pit
power
production
quarry
scraper
site
steel
technology
transportation
wheel
work