Basic principle: Readings present the effective voltage depending on the common worth of samples above a whole number of intervals of the basic frequencyN?u could m?n trúng th??ng x? s? mi?n Trung hãy ??n ngay m?t trong hai ??a ?i?m sau ?? ??i th??ng: ??i lý vé s? ho?c công ty x? s? ki?n thi?t t?i n?i b?n sinh s?ng.You could Review a waveform