You'll be able to Look at a waveform of one section having a waveform of A further period or Assess having a Beforehand calculated waveform on a similar examination point. Web page 69: CommunicationCa?ch ?ô?i ve? tru?ng th???ng x? s? mi?n Nam an toa?n nhâ?t chi?nh la? b?n hãy mang t?? ve? sô? ?o? ?ê?n t?i tru? s?? cu?a nha? ?a?i có ghi trên