Lub tshuab luam ntawv uv lub tshuab luam ntawv yog dab tsi?
Qhov no yog hais txog kev hloov cov duab rau iav xwm txheej.this luam tawm cov duab.which siv tau los sau rau sab nraum qab ntawm cov ntaub ntawv ob-sided los yog saum npoo li sab nraum cov khoom (piv txwv li iav, teeb, thiab lwm yam).
