機器
background
circle
close up
closeup
cog
cogs
cogwheel
concept
design
detail
device
dirty
dust
engine
engineering
equipment
factory
flow
gear
heavy
industrial
industry
inside
interior
iron
large
machinery
macro
mechanical
mechanism
metal
motion
old
part
power
precision
retro
round
rust
rusty
sprocket
steel
technical
technology
transmission
vintage
wheel
work