5 lub thawv loj ntawm polyvinyl chloride (PVC) raug xa mus lawm! Aojin Chemical muab PVC, suav nrog cov qauv SG3, SG5, SG8 Raws li ib qho ntawm tsib lub yas loj, polyvinyl chloride (PVC) yog siv dav hauv ntau qhov chaw xws li kev tsim kho, ntim khoom, txhua hnub xav tau ...
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