機器
abandoned
antique
broken
brown
circle
close
closeup
cog
cogwheels
components
corroded
corrosion
damage
decay
design
detail
equipment
erosion
factory
gear
heavy
industrial
industry
iron
machinery
mechanical
mechanism
metal
mottled
old
oxidation
part
parts
piled
power
rust
rusty
scrap
solid
sprocket
steel
structure
tooth
transmission
vintage
wear
weathering
wheel
winch