英文關鍵字
installs
bicycle
frame
rear
derailleur
puller
ratchet
bearing
balls
wheel
hub
ball
unscrews
chain
gear
mountain
bike
mechanism
component
gearshift
repairman
fixing
repairer
wrench
serviceman
detail
maintenance
cassette
cycle
repair
service
lifestyle
biking
mechanic
occupation
tire
closeup
equipment
fix
job
workshop
work
business
man
professional
employee
transportation
fixes
two
keys
close-up