機器
environmental
background
bin
business
can
car
cargo
clean
cleaning
container
dirty
dump
engine
environment
equipment
garbage
green
industrial
industry
junk
land
load
lorry
man
nature
object
person
recycle
recycling
refuse
rubbish
sanitation
service
sewage
steel
street
sun
thai
transport
transportation
trash
truck
urban
utility
vehicle
waste
wheel
work
worker