Tudalennau sy'n cysylltu â "Delwedd:From this site Guglielmo Marconi made the first public transmission of wireless signals on 27 July 1896.jpg"
Mae'r tudalennau isod yn cysylltu â Delwedd:From this site Guglielmo Marconi made the first public transmission of wireless signals on 27 July 1896.jpg:
Ceir 1 eitem.
- Guglielmo Marconi (cyswllt ffeil) (← dolenni | golygu)