機器
auto
automobile
automotive
background
bearing
belt
black
car
chain
chrome
closeup
cog
cogwheel
drive
engine
engineering
equipment
gear
industrial
industry
iron
isolated
machinery
mechanic
mechanical
mechanism
metal
metallic
motion
motor
new
part
power
precision
pulley
repair
ring
roller
service
shaft
steel
technology
timing
transmission
transportation
vehicle
white