機器
aluminum
アルミニウム
alloy
bike
block
bolt
chromed
closeup
cruiser
cylinder
detail
device
electric
electricity
engine
fuel
gasoline
gear
grunge
heat
heavy
ignition
industry
internal
iron
lightning
mechanic
mechanical
metal
metallic
modern
motor
motorbike
motorcycle
nobody
old
part
pipe
plug
power
powerful
radiator
shiny
spare
spark
spark plug
steel
transport
vehicle
wire