Primary recycling, better known as re-extrusion, is the re-introduction of scrap, industrial or single-polymer plastic edges and parts to the extrusion cycle in order to produce products of the similar material.
求其中re-extrusion的准确含义！
multi-trip plastic是什么意思？
multi-trip plastics have become a more popular choice leading to PSW reduction in
the MSW final stream.
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