機器
antique
blocks
cargo
cart
cavern
decommissioned
deteriorated
engineering
equipment
excavation
gallery
history
industrial
industry
iron
machinery
metal
mine
miner
mineral
minerals
mining
museum
old
out of use
railroad
railway
rock
rust
rusted
rusty
salt
service
site
technology
tourism
track
train
transport
transportation
tunnel
underground
vehicle
vintage
wagon
wall
way
wheels
work