機器
abstract
background
blue
circle
clock
clockwork
closeup
cog
color
concept
connection
cooperation
design
engine
engineering
equipment
gear
gearbox
gearwheel
industrial
industry
machinery
mechanical
mechanics
metal
metallic
motion
motor
movement
object
part
pinion
power
retro
rotation
sprockets
steel
strength
teamwork
technical
technology
time
transmission
turning
watch
wheel
working