機器
car
career
cast
crater
deep
dig
digger
drive
driving
dump
earth mover
ecology
environment
equipment
excavation vehicle
excavator
exploitation
extracting
ferric
freight car
freight train
geology
goods wagon
heavy
industrial
industry
iron
iron mining
iron ore
large
layered
locomotive
material
metal
metal ore
mine
mineral
mining
nature
open
open cast
open pit mine
ore
production
quarry
removing
shovel
supersize
truck
van
yellow