Dị ka mkpa ndị ahịa si dị, dị iche iche nkọwa nke Ọkland ebuli n'elu ikpo okwu ụgbọ ala, Ọkland ebuli hydraulic nyiwe, Ọkland hydraulic ikpo okwu lifts, Ọkland ụgbọ-n'ịnyịnya ikuku ọrụ nyiwe nwere ike ahaziri.Nabata ọhụrụ na ochie ahịa na bia kparita uka.