5 lub thawv loj ntawm polyvinyl chloride (PVC) raug xa tawm! Aojin Chemical khoom siv PVC, suav nrog cov qauv SG3, SG5, SG8 Raws li ib qho ntawm tsib lub hom phiaj tseem ceeb ntawm cov yas, polyvinyl chloride (PVC) tau siv dav hauv ntau qhov chaw xws li kev tsim kho, ntim khoom, niaj hnub nece ...
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