File:René Grillet de Roven, Machine arithmétique à cylindres népériens, 1678, Musée des Arts et Métiers, Paris (8377274673).jpg
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![File:René Grillet de Roven, Machine arithmétique à cylindres népériens, 1678, Musée des Arts et Métiers, Paris (8377274673).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/7/73/Ren%C3%A9_Grillet_de_Roven%2C_Machine_arithm%C3%A9tique_%C3%A0_cylindres_n%C3%A9p%C3%A9riens%2C_1678%2C_Mus%C3%A9e_des_Arts_et_M%C3%A9tiers%2C_Paris_%288377274673%29.jpg/800px-Ren%C3%A9_Grillet_de_Roven%2C_Machine_arithm%C3%A9tique_%C3%A0_cylindres_n%C3%A9p%C3%A9riens%2C_1678%2C_Mus%C3%A9e_des_Arts_et_M%C3%A9tiers%2C_Paris_%288377274673%29.jpg?20140213154029)
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