機器
cartoon
character
circle
cog
cogwheel
cooperation
cute
editable
element
emoticon
emotion
engine
engineering
equipment
expression
funny
gear
gears
happiness
happy
headphone
icon
illustration
industrial
industry
listening
listening music
machinery
mascot
mechanical
mechanics
mechanism
metal
modern
motion
music
note
part
red headphone
round
sing
singing
smile
song
spin
steel
technical
transmission