機器
antique
axe
background
brown
circle
close
cog
cogwheels
corroded
corrosion
decay
design
detail
engine
equipment
factory
gear
industrial
industry
iron
machinery
macro
mechanical
mechanism
metal
old
part
power
pulley
rust
rusty
scrap
spin
sprocket
steel
technology
tooth
transmission
vintage
weathered
wheel
winch
work