機器
axis
background
bicycle
bicyclist
bike
black
cassette
chain
circuit
closeup
component
cycle
derailleur
detail
drive
equipment
gear
industry
kit
machinery
macro
maintenance
mechanic
mechanical
mechanism
metal
metallic
mountain
mountain bike
new
part
racer
rear
repair
road
service
set
shiny
shop
silver
spoke
sprocket
stainless
steel
technology
teeth
vehicle
wheel
workshop