機器
輸出する
boom
bore
cave
cavern
construction
danger
dangerious
deep
dig
digger
digging
discovery
drill
drill gun
driller
drilling
engineering
equipment
excavate
excavated
excavation
exploration
extract
extraction
geology
gold
hard
heavy
industrial
industry
job
machinery
mine
miner
mineral
modern
production
resources
rock
stone
tool
tunnel
tunneling
underground
vehicle
work
working