Chikuru Chekukumbira:1.} Kukakavara kwevhu rine chirwere, uye dhayamu yegwenzi rakakura kupfuura dhaya remuviri werimi ne1 kusvika ku5 cm {}
Kongiri yakakwenenzverwa spiral yekukonzera chivakwa, izvo zvinonyanya kusanganisira chidimbu cheTrapezoidal chikamu chemagumo emukati kuburikidza negomba riri mumugodhi wemukati uye rakapetwa gomba uye rakapedzisira rutivi rwenzvimbo dzekupedzisira.
