-
Daim Npog Tshuaj Nplaum Npog
Cov pa oxygen npog qhov ncauj tsis tau pa raj ua lub tsev tsim cov pa oxygen los yog lwm cov pa roj rau cov neeg mob, thiab nws yuav tsum siv nrog cov pa xa hluav taws xob feem ntau Oxygen daim npog yog tsim los ntawm PVC hauv qib kev kho mob, muaj lub ntsej muag daim npog nkaus xwb.
