機器
auto
automobile
automotive
background
cable
car
chrome
clean
closeup
component
concept
cylinder
detail
diesel
electrical
element
energy
engine
engineering
gasoline
generator
industrial
industry
inside
machinery
manufacturing
mechanic
mechanical
metal
metallic
modern
motor
new
oil
part
piston
power
powerful
repair
shiny
steel
system
technology
torque
transportation
under
valve
vehicle