機器
background
business
circle
clock
cog
cogwheel
communication
concept
connection
construction
cooperation
day
design
element
engine
engineering
equipment
factory
flat
gear
gears
graphic
icon
idea
illustration
industrial
industry
labor
labour
machinery
may
mechanical
mechanism
metal
motion
power
progress
round
sign
symbol
team
teamwork
technical
technology
transmission
web
wheel
work