機器
action
bin
car
city
clean
cleaning
collection
collector
container
denied
dirty
disposal
dump
dustman
ecology
environment
environmental
equipment
garbage
grass
green
industry
job
lorry
machinery
man
municipal
park
person
plastic
recycle
recycling
refuse
removal
reusing
rubbish
sanitation
service
street
transport
transportation
trash
tree
truck
urban
vehicle
waste
work
worker