Ka-hortagga macdanta birta waa hab-socodka ka saaraya qaybaha baandada sida Alumia, Silica ee Birta Birta.
Bamka dareeraha birta sida badeecada ugu muhiimsan ee macdanta Birta birta waa inay noqotaa mid xoqan, daxalaysa, hufan oo kharash-badbaadinaysa.
Waqtiga boostada: Jul-13-2021