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炭:概述其特性和用途
donnaxjmx891852
117 days ago
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يُعرَّف فحم طبيعي بأنه مادة وخشبية ناتجة عن احتراق المواد الطبيعية في غياب الأكسجين. يُستخدم الفحم الطبيعي على مدى
https://deaconacjn957122.vidublog.com/35603654/فحم-طبيعي-لمحة-عن-خصائصه-و-استخداماته
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