機器
3d
action
apparatus
circle
co
cog
cogwheel
communication
component
concept
connection
cooperation
different
element
engine
engineering
equipment
gear
groove
group
idea
illustration
isolated
leader
leadership
machinery
mechanical
mechanics
mechanism
nobody
objects
part
pinion
red
rotate
sprocket
steel
swirl
system
team
teamwork
technology
turn
two
wheels
white background
work