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este telefono era enorme, hevho en madera y metal su unica funcion era transmitir comunicasiones.
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este añadio un sistema de amplificadores de vacio y cables coaxiales ademas de un diseño mas compacto y comodo.
Plan projects on a visual timeline
Map milestones, phases, deadlines, and key events in one place so the sequence is easier to see and share. Timetoast is a timeline maker for work, school, research, and stories.