機器
bicycle
bike
black
cassette
chain
chrome
circle
close
closeup
component
crank
cycle
cycling
detail
drive
equipment
gear
gearing
gearwheel
grease
industry
iron
link
macro
mechanism
metal
metallic
mountain
object
oil
part
race
ring
shiny
silver
speed
spoke
sport
sprocket
stainless
steel
technology
teeth
transmission
transport
transportation
vehicle
wheel