C ibyuma bya purlin nibintu byingenzi mubwubatsi bugezweho, cyane cyane mubice byubaka. Aba banyamuryango b'imiterere, bameze nk'inyuguti "C", bakunze gukoreshwa mu gushyigikira ibisenge ninkuta mu nyubako z'ubucuruzi n'inganda. Igishushanyo cyabo cyemerera igisubizo cyoroheje ariko gikomeye kubibazo bitandukanye byubatswe. Kimwe mubyiza byibanze bya C purl