Mu 10 mbere ya Yesu, umwubatsi wa kera w’Abaroma Vitruvius yasobanuye imashini iterura mu gitabo cye cyubaka.Iyi mashini ifite mast, hejuru ya mast ifite ibikoresho bya pulley, umwanya wikibanza ushyirwaho numugozi wo gukurura, kandi umugozi unyura muri pulley ni ...
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