機器
輸出する
car
cave
cavern
cross
deep
dig
digger
discovery
driving
engineering
equipment
excavate
excavated
exploration
extract
gallery
geology
gold
industrial
industry
inside
lights
load
machinery
mine
mineral
moving
ore
rock
safety
stone
subterranean
transportation
truck
tunnel
tunneling
turn
turning
underground
vehicle
work
working