機器
alloy
background
belt
closeup
cog
copy
details
different
engine
engineering
equipment
exposed
gear
gears
green
industrial
industry
iron
light
machinery
many
mechanical
mechanism
metal
metallic
motor
move
object
part
pipe
power
powerful
pressure
production
raging
repair
rim
rotor
space
stainless
steel
technology
text
torque
transfer
transmission
vehicle
work