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Olivetti SpA
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Addier- und Subtrahiermaschine mit drei Gruppen von Zaehlraedern, von denen zwei, naemlich eine fuer die Bruttobetraege und eine fuer die Tarabetraege, nacheinander einstellbar sind, waehrend die dritte fuer die Nettobetraege hinsichtlich ihrer Einstellung von den Einstellungen der ersteren Gruppen beeinflusst wird