機器
black
brown
cargo
carriage
circle
classic
coupling
curve
destination
detail
dirty
energy
engine
grey
immobile
industrial
industry
iron
journey
land
metal
motionless
object
old
power
rail
railroad
railway
road
rust
rusty
stack
station
stationary
steel
stone
strength
system
technology
track
traditional
traffic
train
transit
transport
transportation
travel
vintage
wheel