機器
abstract
aesthetic
backdrop
background
beautiful
black
bond
business
classic
closeup
cogs
cogwheel
concept
conceptual
connect
cooperation
design
engine
engineering
factory
gearbox
gears
grey
industrial
industry
interlock
macro
mechanical
mechanics
mechanism
metal
metallic
motion
motorcycle
parts
perfect
precious
precision
reliability
rotate
shine
spares
steel
success
team
teamwork
teeth
wheel
work