Cov khoom siv hluav taws xob pov thawj
Cov ntaub ntawv pov thawj hluav taws xob xa mus rau cov ntaub ntawv siv los tiv thaiv lossis ua kom tsis muaj zog hluav taws xob puas tsuaj los ntawm ntau qhov chaw hluav taws xob hluav taws xob.Xws li: txhuas phaj, txhuas cib, txhuas ntawv ci, txhuas particle, txhuas yeeb nkab, barite hmoov, thiab lwm yam.
