You could Evaluate a waveform of one period which has a waveform of An additional period or Look at with a previously calculated waveform on the identical examination stage. Page sixty nine: Communication- Công ty x? s? s? ph?i thanh toán ?? s? ti?n trúng th??ng cho ng??i ch?i trong vòng 5 ngày k? t? khi nh?n ???c ?? ngh? l?nh gi?i th??ng c?a