Ibisobanuro bigufi:

Inyongeramusaruro nimwe mubikoresho fatizo byo gutwikira. Umubare muto winyongera urashobora kunoza cyane imikorere nigikorwa cyo gutwikira, kandi birashobora no kunoza imikorere ya firime, kandi bikagira uruhare mukumenyekanisha ibicuruzwa.