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:-. 1. www.arabelect.net/theori/fiber 2. 63=www.xainoo.com/index.php?p 3.94
www.moqatel.com/mokatel/Data/Behoth/MElm iah12/ALYAF/Mokatel2_1-2.htm 4.www.aljazirah.com.sa/magazine/04112003 /ax50.ht. 5.WWW.alhasebat.com 6. / /. 12-8-2007
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