Ikirere, cyane cyane mu majyepfo, ubusanzwe ikirere gitose, niba guhura n'inkuba, ion mu kirere ni byinshi, igikoresho ubwacyo ni icyuma, gishobora gutera amashanyarazi; Igishushanyo cyibikoresho by'imbere, bifitanye isano nigice cyumuzunguruko, kigomba kuba gifite ibikoresho byizewe, bikingira, kugirango wirinde amashusho ya electrotic of platform hamwe nimashini umutwe .
