英文關鍵字
xray
combustion
motor
3d
illustration
engine
transparent
piston
technology
black
metal
automobile
machine
cylinder
gear
rod
equipment
crankshaft
outline
part
industry
isolated
fuel
glossy
mechanical
steel
energy
horsepower
motion
bearing
iron
dismounted
oil
power
threedimensional
truck
clear
render
ray
radiation
radiography
roentgen
image
green
screen