機器
abstract
antique
background
chain
closeup
coarse
color
corrode
corroded
detail
dirty
engine
equipment
eroded
factory
gear
grunge
industrial
industry
iron
ironworks
material
mechanical
mechanism
metal
metallic
old
oxidation
pattern
plate
rotting
rust
rusted
rusty
steel
steel mills
steelworks
surface
texture
textured
tough
vintage
weathered
wheel
worn
yellow