Ibikoresho bya kabili bitandukanye nibice byingenzi mumashanyarazi, cyane cyane mubice byo guhuza insinga. Ibi bikoresho bitanga uburyo bwizewe bwo kwinjira mu mashanyarazi mugihe yemerera guhagarika byoroshye mugihe bibaye ngombwa. Iyi mikorere idasanzwe ituma bafite agaciro kanini kubikorwa bitandukanye, kuva mubikorwa byinganda kugeza kumishinga yo guturamo. Imwe mu nyungu yibanze ya sepa