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炭:概述其特性和用途
robertoyzz089491
- 31 minutes ago
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يُعرَّف فحم طبيعي بأنه مادة وخشبية ناتجة عن احتراق المواد الطبيعية في غياب الكمية الكافية من الأكسجين. يُستخدم الفحم
https://andrewksws193797.thebindingwiki.com/user
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