1.} ntawv ntawv nplaum
Mas siv nyob rau hauv cov khoom ntxuav ua kua thiab cov khoom lag luam uas muag khoom tau zoo; Cov ntaub ntawv zaj duab xis feem ntau yog siv nyob rau hauv cov khoom lag luam siv txhua hnub hauv Suav teb cov khoom lag luam thiab cov ntawv sau ua kua loj, yog li cov ntawv sau ua kua tau siv ntau dua.
2. Zaj Duab Zaj Duab Ua Si Ntaus Tus Kheej Cov Ntawv Cim
Feem ntau siv peg, pp, pp, pp, cov khoom siv hluavtaws, matona cov ntaub ntawv tsis zoo, muaj cov txheej txheem ua yeeb yaj kiab, qee cov ntaub ntawv kuj tseem tuaj yeem ua rau kev kho mob thiab ua uniaxivly ncab lossis biaxival acceted . Piv txwv, Biaxently ncab bopp cov ntaub ntawv yog muaj ntau.
