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炭:概述其特性和用途
sashahmqo244697
1 day 15 hours ago
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يُعرَّف فحم طبيعي بأنه مادة خشبية ناتجة عن احتراق المواد الخشبية في غياب الأكسجين. يُستخدم الفحم الطبيعي على مدى
https://elijahicqh215688.59bloggers.com/37124936/炭-概述其特性和用途
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