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炭:概述其特性和用途
alvinzche379587
- 1 hour 9 minutes ago
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يُعرَّف فحم طبيعي بأنه مادة عضوية ناتجة عن احتراق المواد الخشبية في غياب الكمية الكافية من الأكسجين. يُستخدم الفحم
https://nelsonxfqn225966.digiblogbox.com/61119388/فحم-طبيعي-لمحة-عن-خصائصه-و-استخداماته
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