टेलीग्राफ साउंडर: Revision history

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3 November 2023

9 February 2023

8 February 2023

1 February 2023

  • curprev 22:0622:06, 1 February 2023alpha>Indicwiki 7,033 bytes +7,033 Created page with "{{Short description|Form of telegraph receiver which converted incoming electrical signals into sounds}} {{More citations needed|date=April 2020}}File:Telegraph Sounder.JPG|..."