英文關鍵字
belt
bottle
business
conservation
container
conveyor
crushing
detail
dump
ecological
ecology
environment
environmental
equipment
escalator
facility
factory
garbage
green
grinding
heap
how
indoor
industrial
industry
installation
ladder
machine
manufacturing
many
material
mill
packaging
pet
pile
plant
plastic
pollution
process
processing
production
recycle
recycling
renewable
renewal
reuse
salvaging
sorting
tank
tape
technology
trash
waste
working
works
workshop