indeksi ItäTimor kirjoittaa walkie talkie invention date brändi kojelauta Levoton
When Were Walkie Talkies Invented | Vision Launch Media
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Walkie Talkie
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Walkie-talkie - Wikipedia
History of wireless and radio communication - wireless history - 1921 artists impression of new inventions that might appear within 100 years (i.e. by 1931) these included television,mobile phones (cell phones), private