Gusaba:

Ibyuma bya manganese birebire cyane, Bikwiranye no gukomera umutwe winyundo, isahani yinyundo nibindi bice byingenzi.

Birakwiriye ibikoresho byindobo bigoye, imashini zicukura nibindi bice byambara

Bikwiranye no gukomera hejuru yimyenda yambara, nkibikoresho, umucukuzi.imashini zicukura amabuye y'agaciro n'ibindi.

Bikwiranye na hardfacing ikomeza gukina

Birakwiye kubice bigoye kwambara ubushyuhe