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April 1, 2024
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24 avr. 1935 - April 1935
Description:
The British Patent for "Radar System for Air Defense" is granted to Robert Watson-Watt
Ajouté au bande de temps:
16 janv. 2018
0
0
549
The Great Depression
Date:
24 avr. 1935
Maintenaint
~ Il y a 89 ans
Les images:
