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