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Neste vídeo você vai conhecer a calculadora Magic Brain Calculator – Chadwick – 1955 – e como fazer as operações de multiplicação. Vídeo completo: https://yo
Magic Brain Calculator - A vintage mechanical addiator type
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Magic Brain Calculator - A vintage mechanical addiator type
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Magic Brain Calculator - A vintage mechanical addiator type
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Magic Brain Calculator with instructions. 1960's.
National Museum of American History
