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炭:概述其特性和用途
lexiehvbf041152
3 days ago
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يُعرَّف فحم طبيعي بأنه مادة خشبية ناتجة عن احتراق المواد العضوية في غياب الهواء. يُستخدم الفحم الطبيعي على مدى الفترة
https://sairakjlp358815.blog5.net/82780072/فحم-طبيعي-لمحة-عن-خصائصه-و-استخداماته
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