英文關鍵字
antibacterial
asphalt
broom
brush
car
city
cleaner
cleaning
detail
dirt
dirty
disinfection
driving
dust
electric
electrical
environment
equipment
floor
industrial
machine
man
manual
outdoor
pavement
paving
pressure
push
road
rotate
rotating
rubbish
sanitation
sidewalk
slabs
street
sweep
sweeper
turn
vacuum
vehicle
walk
wash
washer
washing
water
wet
wheel
work
worker