Site na ọrụ ọsọ ọsọ anyị kwa ụbọchị, anyị nwere ike mechaa wepụta ngwa ahịa (igwe nnwale elektrọnik, igwe na-anwale igwe siri ike nke hydraulic, igwe nnwale mmetụta).N'oge a, anyị mechara tinye nkume ahụ n'ime obi anyị ma nwee ike ibuga ndị ahịa ahịa.Nke a bụ...
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