英文關鍵字
gear
animation
cogwheel
mechanical
movement
engineering
background
engine
industry
machine
metal
teamwork
mechanism
wheel
concept
cooperation
industrial
steel
abstract
mechanics
work
business
factory
metallic
precision
rotate
connect
design
gearbox
macro
team
teeth
classic
interlock
motion
cog
equipment
machinery
aesthetic
backdrop
binding
bond
closeup
cogs
conceptual
gears
motorcycle
parts
precious
shine
spares
success