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炭:概述其特性和用途
flynnkjrz541360
21 hours ago
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يُعرَّف فحم طبيعي بأنه مادة وخشبية ناتجة عن احتراق المواد العضوية في غياب الأكسجين. يُستخدم الفحم الطبيعي على مدى
https://miriamzjco761014.nizarblog.com/36828219/فحم-طبيعي-لمحة-عن-خصائصه-و-استخداماته
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