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炭:概述其特性和用途
alyssaafkd525009
10 hours ago
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يُعرَّف فحم بأنه مادة خشبية ناتجة عن احتراق المواد العضوية في غياب الكمية الكافية من الأكسجين. يُستخدم الفحم الطبيعي
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