Kubice nkibi, ibikoresho byayo ni ibihe? Mu gihe kirekire gishize, umunyamahane wa Cone yakozwe mucyuma cya Manganese kandi yahinduye ibyuma bya Manganese, Carbone Alloy Steel na Chromiuriur Stances Umuyoboro ukomeye wa Mangane, kandi ubungubu kurwanira ibyuma birimo, kandi bikomeye ikomeye .
