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炭:概述其特性和用途
nettiewodq736226
6 days ago
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يُعرَّف فحم بأنه مادة عضوية ناتجة عن احتراق المواد العضوية في غياب الكمية الكافية من الأكسجين. يُستخدم الفحم الطبيعي
https://jesseiweg153348.blogolenta.com/profile
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