英文關鍵字
abstract
african
air
allows
american
bicycle
bike
biking
black
bolts
close
closeup
cyclist
equipment
fix
fixing
gear
going
hand
hands
his
lifestyle
maintenance
male
man
metal
mountain
outdoors
park
parts
people
performing
person
pump
repair
repairer
repairing
ride
service
skill
skilled
spinning
tighten
tire
tool
tools
transportation
view
wheel
wheels
work