機器
abstract
automatic
background
belt
black
blur
bolt
chain
circle
coated
connected
diesel
dirty
dynamo
electric
electricity
engine
gear
geared
generator
grease
greasy
industrial
industry
link
linkage
loop
lubricate
lubrication
mechanical
mechanism
motion
motor
motorized
nut
oil
oily
power
powerful
roller
round
slippery
smeared
sprocket
strength
transport