機器
black
business
circle
clock
cog
cogwheel
communication
concept
connection
construction
cooperation
design
development
editable
element
engine
engineering
equipment
factory
gear
gold
gray
icon
idea
illustration
industrial
industry
mechanism
metal
motion
progress
round
set
shadow
shape
sign
silver
simple
spin
symbol
team
teamwork
transmission
wheel
white
work