英文關鍵字
black
cargo
carriage
coal
decrepit
delivery
diesel
empty
energy
engine
fossil
fuel
heavy
helmet
industrial
industry
line
locomotive
mine
miner
mining
motion
move
movement
natural
neglected
old
powerplant
rail
railcars
railroad
railway
resources
rusty
shoring
steel
support
timbering
track
train
transportation
unloaded
worker
yard