Joang ho rarolla bothata ba ho hasana hampe ha carbon black?
Konkreite ke thepa e sebelisoang haholo meahong ea meaho. Ho phaella linthong tsa eona tsa motheo tse kang matla le ho tšoarella, 'mala o boetse o fetohile thepa ea bohlokoa. Ho eketsoa ha li-pigment tsa iron oxide ka konkreite ho ka etsa hore 'mala oa eona o be monate haholoanyane ...
bala haholoanyane