Imashini zitanga amashanyarazi zikoresha mazutu zigira uruhare runini mu nzego nyinshi, nko mu nganda, mu bwubatsi, mu buhinzi no mu gutanga amashanyarazi mu bihe byihutirwa, nibindi. Ariko, bitewe n’izamuka ry’ibiciro by’ingufu no kongera ubumenyi ku bidukikije, ubushakashatsi ku isesengura ry’ikoreshwa ry’ingufu n’uburyo bwo kuzigama ingufu ...