機器
abstract
aged
antique
auto
automobile
background
black
block
bolt
business
cable
car
connection
detail
diesel
dirty
electric
energy
engine
filter
gas
generator
hood
horse
industry
interior
mechanic
metal
motor
oil
old
part
pattern
pipe
piston
power
repair
rusty
steel
system
technology
tractor
truck
tube
valve
vehicle
wire