Cov ntaub ntawv tseeb qhia tau hais tias thaum lub Kaum Ib Hlis 2020, cov khoom siv PVC hauv tsev tau nce 11.9% piv rau tib lub sijhawm xyoo tas los.Cov tuam txhab PVC tau ua tiav qhov kev kho dua tshiab, qee qhov kev teeb tsa tshiab hauv thaj chaw ntug dej hiav txwv tau muab tso rau hauv kev tsim khoom, kev lag luam kev lag luam tau nce ntxiv, kev lag luam PVC hauv tsev yog qhov zoo, thiab cov zis txhua hli tau nce ntau..
