Ihe mkpuchi okporo ụzọ bụ ezigbo onye inyeaka maka mkpirisi okporo ụzọ. Ihe ka ọtụtụ ná ndị mmadụ maara nke a. Anyị niile ahụla ya n'oge a na-arụ ọrụ, ọkachasị n'iwu okporo ụzọ. Enwere ịnya ụgbọ ala, aka aka, ịma jijiji, hydraulics, wdg, nwere ọtụtụ ụdị na nkọwapụta, ị nwere ike họrọ dị ka mkpa gị si dị. Ihe...
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