Ibikoresho byo kwinjiza ibyuma bya magnetite byavumbuwe kuva kera. Mu bitabo icyenda bya Lu's spring and Autumn Annals, hari umugani: "niba ugize neza bihagije gukurura ibyuma, ushobora kubiganiraho." Muri kiriya gihe, abantu bitaga "magnetism" nk "" ineza ". Th ...
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