Ukurikije ibyo ukeneye, ihindure ibyawe, kandi iguhe ubwenge
Imyaka myinshi yuburambe nubumenyi murwego rwa magnetiki no gutwikira byemeza ubuziranenge bwo hejuru, gutuza no kwizerwa kubicuruzwa byamahirwe.
Ubwiza bwo kubahoGuhanga udushyaKwibanda ku birango byisiGukurikirana abakiriya birashimishije
Umuyobozi ushinzwe kugurisha azagukorera ubuhanga kandi mugihe, harimo mbere yo kugurisha na nyuma yo kugurisha.