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Nchikota mkpuchi nke obere voltaji switchgear
Abstract: N'afọ 1987, akwụkwọ teknuzu nke isiokwu ya bụ "ihe achọrọ maka nhazi mkpuchi mkpuchi na mgbakwunye 1 ruo iec439" bụ nke kọmitii nka nka nke International Electrotechnical Commission (IEC) 17D debere ya, bụ nke webatara nchikota mkpuchi mkpuchi n'ime...GỤKWUO
