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炭:概述其特性和用途
honeysmav767261
1 day 4 hours ago
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يُعرَّف فحم بأنه مادة عضوية ناتجة عن احتراق المواد الطبيعية في غياب الكمية الكافية من الأكسجين. يُستخدم الفحم الطبيعي
https://tedcmsk658253.getblogs.net/69099000/فحم-طبيعي-لمحة-عن-خصائصه-و-استخداماته
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