機器
environmental
action
arm
bin
blue
can
car
city
clean
collar
collection
container
day
driver
empty
environment
equipment
garbage
green
horizontal
industry
job
lift
lifting
mechanical
metal
mobile
motion
moving
municipal
outdoor
paper
plastic
recycle
recycling
robot
rubbish
service
summer
town
transportation
trash
truck
vehicle
waste
wheel
work
worker