Oge ndị dị mkpa ejiri mee ihe n'ụzọ ziri ezi, yana n'okpuru nnukwu mmetụta, ịma jijiji ma ọ bụ ibu ọzọ.
A na-ejikarị eme ihe n'okporo ụzọ awara awara na àkwà mmiri ụgbọ oloko, ụlọ ọrụ mmepụta ihe na ụlọ obodo, ụlọ elu, cranes.Nke a akụkụ bụ kposara ọnụ na bolts.