機器
auto
automobile
automotive
background
belt
black
car
clean
closeup
cog
detail
device
engine
engineering
equipment
gear
industrial
industry
isolated
maintenance
mechanic
mechanical
metal
motion
motor
new
object
part
power
precision
repair
replacement
rubber
service
shape
spare
strap
surface
technology
teeth
tension
timing
tool
toothed
transport
transportation
vehicle
white