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炭:概述其特性和用途
anyajyxt530525
5 days ago
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يُعرَّف فحم بأنه مادة خشبية ناتجة عن احتراق المواد العضوية في غياب الأكسجين. يُستخدم الفحم الطبيعي على مدى السنوات
https://rorymnhb734885.blog-kids.com/36912033/فحم-طبيعي-لمحة-عن-خصائصه-و-استخداماته
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