機器
3d illustration
business
clock
clockwork
cog
cogs
cogwheel
concept
conceptual
connect
connection
cooperation
engine
engineering
equipment
factory
gear
gearbox
gears
gearwheel
illustration
industrial
industry
machinery
mechanic
mechanical
mechanics
mechanism
metal
metallic
motion
parts
power
precision
progress
rotate
rotation
set
spin
steel
team
teamwork
technical
technology
teeth
transmission
web
wheels
work