Galasi yomwe imagwiritsidwa ntchito popanga ulusi wagalasi ndi yosiyana ndi ya magalasi ena. Galasi yomwe imagwiritsidwa ntchito popanga ulusi womwe wagulitsidwa padziko lonse lapansi imakhala ndi silika, alumina, calcium oxide, boron oxide, magnesium oxide, sodium oxide, ndi zina zotere malinga ndi zomwe zili mugalasi, ...
Werengani zambiri