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炭:概述其特性和用途
francesisou530103
2 days ago
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يُعرَّف فحم بأنه مادة عضوية ناتجة عن احتراق المواد الطبيعية في غياب الأكسجين. يُستخدم الفحم الطبيعي على مدى السنوات
https://ezekiellrls073493.blogscribble.com/36779586/炭-概述其特性和用途
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