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ماهي العوامل الصناعية التي تضر بالطبيعة و كيف يمكن معالجتها؟

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Question added by عبد السلام هلال , TECHNIQUE EDUCATION , EDUCATION
Date Posted: 2015/10/24

الغازات السامة  وتتم معالجتها بواسطة التصفية

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