機器
belt
bottle
business
collection
conservation
construction
conveyor
disposal
dispose
dump
ecological
ecology
environment
environmental
equipment
factory
falling
garbage
global
heap
indoors
industrial
industry
manufacturing
material
paper
pile
plant
plastic
pollution
process
processing
production
recycle
recycled
recycling
renewable
renewal
reusable
reuse
rubbish
sorted
sorting
steel
technology
trash
volunteer
waste
working
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