Ndị ọrụ anyị na-akwakọba ihe ndọba ụgbọala na-atụgharị. E tinyere ya n'ime otu ngwugwu abụọ. Igwe ndọba ụgbọala na-atụgharị bụ nke nwere hydraulic. Ọ nwere ike ibuli naanị ihe ndọba ụgbọala na-ebuli elu, a pụkwara ịgbanwekwa ịdị elu nke ihe ndọba ụgbọala. Ọ dabara adaba maka ụlọ ala nwere obere ụlọ.
Oge ozi: Mee-18-2022