Icyatsi cya nyakatsi gikozwe mu nsinga zishyushye zometseho insinga, diameter yo hanze n’imbere iratandukanye, naho insinga zo hanze zifite t / s ndende.Iri pfundo rikora nka hinge itanga munsi yigitutu, hanyuma igasubira mumiterere.Ibi bitanga kwishyiriraho byoroshye kuko hinge "itanga" mugihe igumana uburebure bwuzuye bwo gukomeza kurinda no kugaragara neza.Intsinga zihagaritse zaciwe kugiti cyazo kandi zipfunyitse kubwimbaraga nini kandi zoroshye.