Inkokora ya dogere 90 ni adapt isanzwe.Kubera ko umuyoboro woroheje udafite ubugororangingo, birashobora guhindurwa gusa binyuze muri adapt kugirango uhindure icyerekezo na diameter;inkokora ya dogere 90 ifite imigozi ibiri yimbere, imigozi ibiri yo hanze, hamwe ninyuma yimbere ninyuma.Hariho ubwoko butatu, uyikoresha arashobora guhitamo guterana ukurikije ibikenewe kurubuga.