Chowonjezera chamtundu wa humic acid ndi mtundu wamafuta a polima bwino a simenti otayika omwe akhala akutchuka m'zaka zaposachedwa.Monga chimodzi mwazinthu zatsopano za Oilbayer, kampani yomwe imagwira ntchito bwino pa R&D ndikupanga mankhwala opangira mafuta, chowonjezera chotayika chamadzi ichi ...
Werengani zambiri