機器
abstract
background
brain
business
clock
cog
cogwheel
color
comic
communication
concept
creative
design
doodle
draft
drawn
element
engine
engineering
gear
graphic
head
human
icon
idea
illustration
imagination
industrial
isolated
mechanical
mechanism
mind
naive
pen
rotation
rough
science
sign
silhouette
spin
symbol
technical
technology
tool
transmission
watch
wheel