Ingaruka:
Umuyoboro wa fuse ushyizwe hamwe numuyoboro wo hanze.Iyo fuse ihujwe numuzunguruko, gushonga bihujwe murukurikirane rwumuzunguruko, kandi umutwaro wumutwaro unyura mumashanyarazi.Iyo umuzunguruko mugufi cyangwa birenze urugero bibaye muruziga, umuyoboro unyuze mu gushonga bituma ushyuha;iyo igeze ku bushyuhe bwicyuma cyashongeshejwe, izahuza ubwayo, kandi umuzenguruko wamakosa uzacibwa hamwe nogutwika arc no kuzimya arc kugirango bigire uruhare mukurinda.