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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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24 jun 1897 año - Karl Ferdinand Braun construye el primer tubo catodico
Añadido al timeline:
jorge
By
Jorge González Cordero
17 nov 2017
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342
fecha:
24 jun 1897 año
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~ 128 years ago
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