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炭:概述其特性和用途
declanlxxs815232
18 hours ago
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يُعرَّف 炭 بأنه مادة عضوية ناتجة عن احتراق المواد الطبيعية في غياب الكمية الكافية من الأكسجين. يُستخدم الفحم الطبيعي
https://louisemofj145965.tokka-blog.com/profile
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