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See on Wikipedia : https://ar.wikipedia.org/wiki/%D8%B9%D8%A8%D8%AF %D8%A7%D9%84%D9%81%D8%AA%D8%A7%D8%AD %D8%A5%D8%B3%D9%85%D8%A7%D8%B9%D9%8A%D9%84 (%D8%A5%D8%AE%D9%88%D8%A7%D9%86 %D9%85%D8%B3%D9%84%D9%85%D9%88%D9%86).
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