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ماهي اهم المواد المستخدمة في صناعة الحبال العملاقة للجسور المعلقة

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Question added by omar alobaidy
Date Posted: 2014/12/01
Zine eddine Darrab
by Zine eddine Darrab , Quality Control Engineer , ANRH

الحديد   المعدن

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