機器
adjustment
background
bicycle
bike
black
chain
chain ring
cog
component
cycling
derailleur
device
drive
echo
element
engine
equipment
gear
gears
gearwheel
industry
iron
mechanic
mechanical
metal
metallic
mountain
mtb
new
part
people
power
rear
repair
ring
road
service
spare
speed
sport
sprocket
steel
technology
teeth
transportation
vector
vehicle
wheel
work