You can Examine a waveform of 1 phase having a waveform of Yet another period or Examine that has a Beforehand measured waveform on the same examination position. Page sixty nine: ConversationTh? thao David Raya ti?c ch? c?n ???c… 2 qu? 11m Arsenal 4-2 Porto luân l?u David Raya tr? thành ng??i hùng ??a Arsenal vào t? k?t Cúp C1, khi c?n ???c