機器
background
black
business
circle
cog
cogwheel
collection
concept
design
different styles
eight
element
engine
engineering
equipment
factory
fang
five
gear
gear wheel
gears
icon
illustration
industrial
industry
machinery
mechanical
mechanism
mechanism elements
metal
motion
nine
progress
set
seven
sign
silhouette
spoke
sprocket
symbol
technology
ten
tine
tooth
transmission
web
wheel
work