Ni iki kindi gishobora kwitwa rivets za oblate head blind?

Ibyuma bifunganye byo mu mutwe bishobora no kwitwa:

Ibyuma bifunganye bifite umutwe ugororotse, ibikururana bifite umutwe ugororotse, ibikururana bifite umutwe ugororotse, ibikururana bifite umutwe ugororotse.

https://www.yukerivet.com/news/what-are-the-surface-treatment-methods-for-anti-corrosion-of-closed-countersunk-head-blind-rivets/