1. Guhitamo amariveti adafunguye ntabwo ari byo. Ibi birashoboka niba ubunini bugomba gufatirwa buri munsi y'ubunini ntarengwa bwa riveti idafunguye.
2. Ubwiza bwa riveti idakingiye ubwayo. Iki kibazo gishobora kubaho iyo ubwinshi bw'umwobo w'imbere w'umutwe wa riveti burenze 0.15mm, cyangwa niba umutwe wa riveti ufunze neza.
Igihe cyo kohereza: Nyakanga-14-2022