機器
abandoned
ancient
background
broken
brown
closeup
cog
cogwheel
components
corroded
corrosion
decay
detail
dirty
element
engine
engineering
equipment
factory
gear
grunge
industrial
industry
iron
machinery
macro
mechanical
mechanism
metal
metallic
old
parts
power
pulley
round
rust
rusted
rusty
scrap
scratched
sprocket
steel
technology
tooth
transmission
vintage
weathered
wheel
work