英文關鍵字
animation
auto
background
black
blueprint
car
chamber
chrome
combustion
crankshaft
cylinder
design
diesel
engine
engineering
four
fuel
gasoline
gear
horse
illustration
industrial
industry
isolated
mechanic
mechanical
mechanism
metal
motion
motor
part
piston
render
rotating
scheme
shiny
silver
steel
technology
transport
transportation
vehicle