機器
armor
armored
auto
automobile
automotive
background
belt
car
carburetor
component
cylinder
detail
diesel
engine
engineering
equipment
fuel
gas
gasoline
gear
heavy
hood
industry
maintenance
mechanic
mechanics
mechanism
metal
military
motor
new
oil
part
parts
piston
power
repair
service
steel
system
tank
technology
transport
transportation
truck
valve
vehicle