機器
broom
brush
care
caretaker
cart
china
city
cleaner
cleanup
dust
employee
floor
foliage
garbage
hygiene
janitor
job
laborer
landscaping
litter
maid
maintenance
neat
occupation
person
profession
professional
push
recycling
reflective
remove
road
routine
rubbish
servant
service
sidewalk
street
sweeping
technique
tool
transport
uniform
urban
utility
vehicle
walkway
waste
worker