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炭:概述其特性和用途
alyshauuat379285
25 days ago
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يُعرَّف فحم بأنه مادة خشبية ناتجة عن احتراق المواد الطبيعية في غياب الهواء. يُستخدم الفحم الطبيعي على مدى السنوات لعدة
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