機器
assembly
automobile
automotive
background
bike
block
car
closeup
crankshaft
cylinder
daylight
device
dirty
disassembled
engine
equipment
fuel
gasoline
gear
head
iron
land
machinery
made
maintenance
mechanical
metal
metallic
motor
oil
old
part
parts
piston
power
repair
rusty
service
shop
space
steel
sun
technology
transport
transportation
tube
valve
vehicle
workshop