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炭:概述其特性和用途
mollyxnfd456117
3 days ago
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يُعرَّف 炭 بأنه مادة عضوية ناتجة عن احتراق المواد الخشبية في غياب الكمية الكافية من الأكسجين. يُستخدم الفحم الطبيعي على
https://pennyfxea550484.actoblog.com/profile
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