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炭:概述其特性和用途
tedqrnb196024
4 days ago
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يُعرَّف فحم بأنه مادة وخشبية ناتجة عن احتراق المواد الخشبية في غياب الهواء. يُستخدم الفحم الطبيعي على مدى القرون لعدة
https://siobhansfef621058.creacionblog.com/36379105/炭-概述其特性和用途
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