機器
belt
carry
collection
conservation
control
conveyor
disposal
divide
ecofriendly
ecology
empty
environment
environmental
equipment
facility
factory
footbridge
garbage
ground
industrial
industry
junk
machinery
material
plant
platform
pollution
principle
procedure
process
production
recycling
resource
responsibility
reuse
rubbish
safety
separate
service
sort
system
technology
tool
transport
trash
treatment
utilization
waste
worker