Feri ya Caster, ukurikije imikorere irashobora kugabanywamo ibice bitatu rusange: uruziga rwa feri, icyerekezo cya feri, feri ebyiri.A. Uruziga rwa feri: byoroshye kubyumva, rushyizwe kumurongo wikiziga cyangwa hejuru yiziga, bikoreshwa nigikoresho cyibirenge.Igikorwa nugukanda hasi, uruziga ntirushobora guhinduka, ariko rushobora ...
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