
Gutwara umwuka mwinshi, gutanga umwuka uhoraho, imikorere myiza:
Moteri ya mazutu, ifite uburyo bwo kuyikoresha mu buryo butaziguye cyangwa uburyo bwo kuyikwirakwiza mu buryo bworoshye, itanga ubushobozi bwinshi, ikoresha umuvuduko uri hagati kugeza hejuru, ihuze n'ingufu zikoreshwa mu gukoresha umwuka mwinshi nko gukoresha imashini zitobora mu mwobo, imashini zikoresha amazi, n'ibikoresho byo guturitsa umucanga.
Imiterere ikomeye, irinda ingaruka kandi iramba:
Yagenewe imiterere y’ubutaka, imashini yose ifite icyuma gikomeye. Ibice by'ingenzi birinzwe guhungabana n'umukungugu, bigatuma ishobora kwihanganira ubwikorezi bwo mu muhanda butose ndetse n'ahantu hakorerwa ivumbi kandi hahindagurika cyane, bigaragaza ko iramba cyane.

