Cov khoom ua tau yog cov khoom uas tawm ntawm cov dej noo noo thiab feem ntau muab cais ua ob pawg: tshuaj lom neeg xws li tshuaj calcium sulfate thiab calcium chloride, uas muaj dej nrog rau cov dej kom qhuav; lub cev lom zem xws li silica gel thiab nquag Alumina thiab cov zoo li, thiab qhuav los ntawm cev nqaij daim tawv.
Txwv tsis pub muaj kev txwv
Jan 30, 2018
Tso lus
Xa kev nug

