Je, bidhaa hiyo lazima izamishwe ili kuondoa riveti za kichwa cha mviringo?

Sio lazima kutoboa mashimo yaliyozama kinyume ili kuvuta riveti zenye vichwa vya mviringo vilivyoondolewa.

https://www.yukerivet.com/news/do-countersunk-head-rivets-require-countersunk-holes/