機器
abandoned
abstract
ancient
antique
background
blue
boiler
classic
copper
corroded
danger
dial
dirt
dirty
dull
equipment
faucet
grunge
grungy
heritage
historic
industrial
industry
knobs
lavatory
museum
old
pipe
piping
plumb
plumbing
pressure
red
rust
rusted
rusty
stained
steam
steel
stopcock
tube
valve
vintage
wall
waste
water
weathered
white