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炭:概述其特性和用途
asiyabmfp682535
23 hours ago
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يُعرَّف 炭 بأنه مادة عضوية ناتجة عن احتراق المواد الخشبية في غياب الكمية الكافية من الأكسجين. يُستخدم الفحم الطبيعي على
https://saadkfsb950476.thezenweb.com/فحم-طبيعي-لمحة-عن-خصائصه-و-استخداماته-74767482
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