Gi?i m?i (bao g?m t?t c? gi?i nào có s? thay ??i, c?p nh?t m?i ho?c ?i?u ch?nh) It is possible to Evaluate a waveform of one period which has a waveform of A different stage or Assess with a Earlier measured waveform on a similar take a look at position. Page 69: Conversation