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Costi Erro Candido
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Costi Erro Candido
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Priority to ES2285ApriorityCriticalpatent/ES2285A1/es
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ES2285A1882-03-101882-03-10Unos aparatos mecánico prácticos para la enseñanza de la aritmética y sistema decimal en su parte fundamental.
ExpiredES2285A1
(es)