Category talk:Mechanical calculators

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All machines in are based on Odhner pinwheel mechanism. Then i'd suggest to move this category into. In doing this job, it could be useful to create new Odhner's subcategories: Brunsviga, Russian, Original Odhner, similar mechanisms, ... --Ancelli (talk) 08:54, 4 November 2011 (UTC)

Last modified on 4 November 2011, at 08:54