機器
3d
4
auto
automobile
background
burning
car
chrome
chromium
color
complexity
connecting
crankshaft
cylinder
design
element
energy
engine
engineering
exploding
fire
fuel
gas
gear
horsepower
industrial
industry
iron
isolated
line
machinery
mechanical
metal
metallic
motor
pipe
piston
power
render
rod
shining
shiny
silver
speed
steel
tech
technology
vehicle
white