Gukurura imirongo irimo aluminium, ibyuma, nicyuma.Niki cyuma kitagira umuyonga cyuma gihumye?

Icyuma kitagira umuyonga rivet ni uko igikonjo cy'imisumari ari ibyuma bitagira umwanda kandi inkoni y'imisumari ni icyuma, ibyo bita ibyuma bitagira umuyonga rihumye.