Ingano yo gufungura umwobo wa rivet ni: min (ntarengwa) + 0.1 max (ntarengwa) + 0.2.
Ubunini bwuzuye bwibikorwa ni 45% - 65% byuburebure bwa rivet, byaba byiza bitarenze 60%, kandi uburebure bwakazi ntibukwiye kuba bugufi cyane, mubisanzwe 50% –60%.
Urugero: Niba ubunini bwuzuye bwibikorwa 2 cyangwa byinshi byakazi ari 6mm, uburebure bwa rivet bugomba kuba 9.23-13.3 mm.
Igihe cyo kohereza: Kanama-10-2022