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| View Original: | Toho Unitrex electromechanical adding machine - Ridai Museum of Modern Science, Tokyo - DSC07552.JPG (-3648x4245) | |||
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| Keywords: Toho Unitrex electromechanical adding machine - Ridai Museum of Modern Science, Tokyo - DSC07552.JPG en Exhibit in the Ridai Museum of Modern Science Tokyo University of Science Kagurazaka campus - 1-3 Kagurazaka Shinjuku-ku Tokyo 2015-02-20 02 06 50 own Daderot other versions cc-zero Electromechanical adding machines in the Ridai Museum of Modern Science Unitrex calculators | ||||
