Polycrystalline fibre fibre ifite ubucucike buke, ubushyuhe buke bwumuriro, guhangana nubushyuhe bwiza bwumuriro, temp ikora cyane, ituze ryimiti myiza, imiti irwanya ruswa nibindi biranga, ikoreshwa cyane mubyuma, ubwubatsi, ububumbyi, ikirere, igisirikare nibindi nganda.