O le a se isi mea e mafai ona ta'ua ai rivets tauaso oblate tapuni?

E mafai foi ona taʻua rivets tauaso oblate ulu:

Tapuni mafolafola ta'amilomilo ulu fa'aipo fa'atosina, tapuni mafolafola ta'amilomilo toso rivets, tapuni mafolafola ta'amilosaga toso rivets, tapuni mafolafola ta'amilosaga toso rivets.

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