Ụgbọ mmiri anyị gantry crane nwere usoro dị mfe ma sie ike, nke kachasị nke nwere oghere gantry, usoro ebuli elu, usoro ịkwọ ụgbọ mmiri, setịpụ wiil, usoro nnyefe hydraulic na usoro nchịkwa eletrik. Ihe owuwu ígwè bụ isi bụ oghere gantry nke U-, nke dị mfe iburu ụgbọ mmiri dị iche iche ...
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