機器
abandoned
antique
bokeh
business
closeup
connection
country
destination
detail
dof
focus on foreground
gauge
gravel
heavy industry
historical
history
joint
junction
junkyard
line
logistic
material
metallic
nobody
obsolete
old
outdated
parallel
pebble
pieces
platform
public transportation
rail
railroad
railway
rod
route
row
rusty
single
sleeper
straight
structure
surface
technical
track
tram
voyage