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  • Kev siv cov khoom siv PVC

    Kev siv cov khoom siv PVC

    Polyvinyl chloride (PVC) yog ib lub polymer ua los ntawm polymerization ntawm vinyl chloride monomer (VCM) nyob rau hauv lub xub ntiag ntawm pib xws li peroxides thiab azo tebchaw los yog th...
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