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炭:概述其特性和用途
jemimagcll880086
8 minutes ago
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يُعرَّف فحم بأنه مادة عضوية ناتجة عن احتراق المواد الطبيعية في غياب الكمية الكافية من الأكسجين. يُستخدم الفحم الطبيعي
https://antonkndw479302.blog5star.com/37138798/炭-概述其特性和用途
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