英文關鍵字
round
background
object
circle
equipment
metal
person
detail
steel
male
man
mountain
industrial
socket
technology
hand
service
engine
work
tool
job
part
chain
metallic
wheel
bicycle
bike
spoke
rim
tire
repair
screw
Rear
wheels
wrench
workshop
mechanic
worker
tighten
maintenance
adjusting
bicyclist
process
fix
rotating
technician
Adjustment
brake
alignment
truing