機器
big
business
car
coal
construction
deep
dig
digger
dump
earth
equipment
excavation
excavator
geology
giant
heavy
industrial
industry
large
loading
machinery
metal
mine
mineral
minerals
mining
mover
open
opencast
openpit
ore
pit
power
production
shovel
size
super
supersize
tractor
truck
trucks
vehicle
work
yellow