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炭:概述其特性和用途
gregorykkrm210084
2 days ago
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يُعرَّف فحم طبيعي بأنه مادة وخشبية ناتجة عن احتراق المواد الطبيعية في غياب الأكسجين. يُستخدم الفحم الطبيعي على مدى
https://aishaxdns261126.blogsvila.com/36854989/炭-概述其特性和用途
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