It is possible to Look at a waveform of one phase using a waveform of Yet another period or Review with a Earlier calculated waveform on the same examination issue. Web page 69: CommunicationD??i ?ây là th?ng kê gi?i ??c bi?t x? s? mi?n B?c trong 30 k? quay g?n nh?t, b?n có th? dùng ??i chi?u v?i k?t qu? d? ?oán XSMB c?a X? s? 360 các k? tr?