機器
aerial
bulldozer
cast
coal
crane
deep
dig
digger
digging
dirty
dump
dumper
ecology
engineering
environment
equipment
excavation
excavator
extraction
extractive
fossil
geology
heavy
industrial
industry
iron
loading
machinery
metal
metallurgy
mine
miner
mineral
mining
moving
open
ore
pit
processing
production
quarry
resource
rock
surface
transport
truck
vehicle
work
working