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شرح مبسط للنظرية النسبية بشقيها العامة و الخاصة
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7/21/2019 حكاية النسبية - المهندس عبدالحفيظ أحمد العمري
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7/21/2019 حكاية النسبية - المهندس عبدالحفيظ أحمد العمري
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7/21/2019 حكاية النسبية - المهندس عبدالحفيظ أحمد العمري
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