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炭:概述其特性和用途
dianemrht896527
10 days ago
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يُعرَّف 炭 بأنه مادة وخشبية ناتجة عن احتراق المواد الطبيعية في غياب الهواء. يُستخدم الفحم الطبيعي على مدى القرون لعدة
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