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炭:概述其特性和用途
gregoryluzo185404
1 day 10 hours ago
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يُعرَّف فحم بأنه مادة وخشبية ناتجة عن احتراق المواد الطبيعية في غياب الهواء. يُستخدم الفحم الطبيعي على مدى القرون لعدة
https://jesseiweg153348.blogolenta.com/profile
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