Cov Naphthalene uas tau ua kom zoo

Cov Khoom Siv Raw Yas Yas Refined Naphthalene

Cov khoom siv tshuaj lom neeg ua los ntawm cov khoom siv yas ua kom cov nplaim dej ua haujlwm ua cov khoom siv hluavtaws ua kom zoo naphthalene

kev nug cov ntsiab lus