Umuyoboro udasanzwe wicyuma nubwoko bwambukiranya ubukungu igice cyicyuma kirimo igice cyambukiranya uruziga, urukuta rwuburinganire buringaniye, ubugari bwurukuta ruhindagurika, igice cyerekana, igice kidahuje, nibindi nka kare, urukiramende, conical, trapezoidal, spiral, n'ibindi Th ...
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