Sobanura akamaro k'ibikorwa bya 'Ubururu' ku byuma bya karubone bigumana impeta.

'Ubururu' ni uburyo bwo kuvura ubushyuhe buke ($ 260-370 ^ \ umuzenguruko C $) butanga magnetite yoroheje, irinda ($ Fe_3O_4 $) ku cyuma cya karubone. Kurenga ubwiza bwubwiza, ubu buryo bukora nkuburuhukiro bworoheje kandi butanga umusingi wibikoresho byangiza amavuta. Ku mpeta zizunguruka, zikomerekejwe n’umugozi uringaniye, ubururu bufasha guhagarika umurambararo kandi bikarinda 'isoko' ishobora kubaho mugihe ibikoresho byakorwaga gusa. Nuburyo buhendutse kubindi bikoresho bihenze kumashini zo murugo.