Readings clearly show the efficient voltage according to the common worth of samples in excess of a whole variety of periods of the fundamental frequencyx? s? hôm nayxsmtsxmtx? s? mi?n trungk?t qu? x? s? mi?n trungkqxsmtxsmt hôm nayx? s? mi?n trung hôm nayx? sô hôm nayB?m ? ?? theo dõi VOH trênNgoài ra, ng??i ch?i s? ???c h??ng ?ãi ng? t??