thread
Tsanangudzo Pfupi
A spiral shaped continuous convex chikamu chine chikamu chakati chakagadzirwa pamusoro pecylindrical kana conical matrix.Shinda dzakakamurwa kuita cylindrical shinda uye conical shinda zvinoenderana nechimiro chemubereki wavo;Inogona kupatsanurwa kuita shinda yekunze uye shinda yemukati zvichienderana nenzvimbo yayo mumutumbi wemubereki, uye inogona kukamurwa kuita shinda yetriangular, rectangular shinda, trapezoidal shinda, serrated shinda uye mamwe akakosha maumbirwo shinda zvinoenderana nechikamu chechimiro (mazino chimiro).