Ibicuruzwa bikozwe mubyuma byo mu rwego rwo hejuru bidafite ibyuma 304. Amasahani yakubiswe kandi asunikwa na bores hakoreshejwe ikoranabuhanga risobanutse. Ipine, igihuru, uruziga rukoreshwa nibikoresho byikora byikora cyane hamwe nibikoresho byo gusya byikora, uburyo bwo guturika hejuru nibindi nibindi.