Kev tshuaj xyuas yav tom ntej qhia tau hais tias kev muab khoom PVC hauv tsev yuav raug txo vim tsis muaj cov khoom siv raw thiab kev kho dua tshiab. Tib lub sijhawm, cov khoom muag hauv zej zog tseem tsawg heev. Qhov kev thov hauv qab no feem ntau yog rau kev rov ua dua tshiab, tab sis kev siv lag luam tag nrho tsis muaj zog. Kev ua lag luam yav tom ntej tau hloov pauv ntau, thiab qhov cuam tshuam rau kev ua lag luam yeej ib txwm muaj. Kev cia siab tag nrho yog tias kev ua lag luam PVC hauv tsev yuav hloov pauv ntawm qib siab.
