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炭:概述其特性和用途
royjqcd229851
1 day 11 hours ago
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يُعرَّف فحم بأنه مادة وخشبية ناتجة عن احتراق المواد العضوية في غياب الكمية الكافية من الأكسجين. يُستخدم الفحم الطبيعي
https://craigmwjw290011.sharebyblog.com/36413376/فحم-طبيعي-لمحة-عن-خصائصه-و-استخداماته
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