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