A na-akpọkwa pin cylindrical na-agbanwe agbanwe, nke a na-akpọ pin cylindrical na-agbanwe bụ ụdị ntụtụ, nke a na-ejikarị na mpempe akwụkwọ ma ọ bụ mpempe akwụkwọ, n'ihi na ntụtụ cylindrical na-agbanwe nwere àgwà na-agbanwe agbanwe na aha ya.