機器
agent
auto
automobile
automotive
car
cartoon
character
component
cop
cute
detective
emoticon
emotion
energy
engine
engineering
equipment
expression
fuel
funny
gear
happy
illustration
industrial
industry
magnifying
mascot
mechanic
mechanical
mechanism
mission
motor
motorcycle
mystery
piston
police officer
private eye
rotation
scheme
shiny
sleuth
smile
speed
technology
transport
transportation
truck