Muaj 6 pawg loj ntawm cov yas siv feem ntau, polyester (PET polyethylene terephthalate), high-density polyethylene (HDPE), low-density polyethylene (LDPE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS). Tab sis, koj puas paub yuav ua li cas txheeb xyuas cov ...
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