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炭:概述其特性和用途
deweybmcg618055
2 days ago
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يُعرَّف فحم بأنه مادة وخشبية ناتجة عن احتراق المواد العضوية في غياب الكمية الكافية من الأكسجين. يُستخدم الفحم الطبيعي
https://darrenptvt869322.magicianwiki.com/user
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