Yas Hnab Lim Tsev
-
Yas Hnab Lim Tsev
Lub hnab yas ntim cov tsev tuaj yeem ua tau raws li kev lees paub daim ntawv thov ntawm ntau yam tshuaj tshuaj lom thiab cov kev daws teeb meem alkali. Lub tsev ib-lub sijhawm ua kom yooj yim dua.