#dah__dash  the longer of the two telegraphic signals used in Morse code
  supertype:  #telegraphic_signal__telegraphicsignal__radiotelegraphic_signal  a signal transmitted by telegraphy
  part of:  #international_Morse_code__Morse__Morse_code  a telegraph code in which letters and numbers are represented by strings of dots and dashes (short and long signals)

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