Facade bangon yumbu don gini
1, duniya ta farko "bakin ciki, haske da kuma manyan" inorganic yumbu farantin, duka adhering ga abũbuwan amfãni daga inorganic kayan, amma kuma watsi da disadvantages na dutse, siminti farantin, karfe farantin karfe da sauran gargajiya inorganic kayan kauri, high carbon; 2...
duba daki-daki