Piv nrog cov ntaub ntawv PET thiab PP, PP yuav ua tau zoo dua hauv kev ua haujlwm.1. Qhov txawv ntawm lub ntsiab lus PET (Polyethylene terephthalate) lub npe scientific yog polyethylene terephthalate, feem ntau hu ua polyester resin, yog cov khoom siv cob.PP (polypropylene) s...
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