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Joly Firmin Marius
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Joly Firmin Marius
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Priority to ES1396ApriorityCriticalpatent/ES1396A1/es
Publication of ES1396A1publicationCriticalpatent/ES1396A1/es
Un procedimiento para la aplicación del tungsteno y de los metales similares, en sustitución del platino, a los contactos de los interruptores de las magnetos para el encendido de los motores de explosión.