Kuv tuaj yeem siv pvc yeeb nkab rau cov dej ntws

Hauv kev tsim kho niaj hnub thiab kev tsim vaj tsev hauv nroog, kev tsim thiab xaiv cov khoom siv ntawm cov kav dej yog qhov tseem ceeb tshaj plaws. PVC (polyvinyl chloride) cov yeeb nkab tau dhau los ua ib qho ntawm cov khoom siv rau kev tso dej vim…