機器
action
asphalt
broom
brush
car
city
clean
cleaner
cleaning
cleanliness
cleanup
dirt
dirty
driving
dust
environment
equipment
garbage
hygiene
industrial
industry
machinery
mechanical
motion
municipal
neat
nobody
outdoor
pavement
road
rotate
rubbish
service
sidewalk
special
street
sweep
sweeper
sweeping
technology
transportation
truck
urban
vacuum
vehicle
wash
waste
wheel
work