Raws li tus neeg teb xov tooj them chaw nres tsheb thiab cov neeg siv, koj puas xav tias muaj teeb meem los ntawm txoj kev teeb tsa ntawm cov chaw them nqi?Koj puas txhawj xeeb txog qhov tsis ruaj khov ntawm ntau yam khoom siv?Piv txwv li, cov chaw them nqi ib txwm muaj muaj ob txheej txheej ntawm lub casing (pem hauv ntej thiab nraub qaum), thiab cov neeg muag khoom feem ntau siv cov c...
Nyeem ntxiv