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炭:概述其特性和用途
nikolaskhsu940418
7 hours ago
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يُعرَّف فحم بأنه مادة خشبية ناتجة عن احتراق المواد الطبيعية في غياب الأكسجين. يُستخدم الفحم الطبيعي على مدى القرون
https://harleyuvsq961947.ka-blogs.com/89755045/فحم-طبيعي-لمحة-عن-خصائصه-و-استخداماته
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