اعتلال الأعصاب ، محطة طاقة تعمل باللغنيت ، صناعة ، التلوث ، مدخنة ، توليد الطاقة ، منطقة صناعية ، بخار الماء ، دخان ، هندسة معمارية ، مجالات تنزيل مجاني
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