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炭:概述其特性和用途
sashaqfwc836057
2 days ago
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يُعرَّف فحم طبيعي بأنه مادة وخشبية ناتجة عن احتراق المواد العضوية في غياب الأكسجين. يُستخدم الفحم الطبيعي على مدى
https://jaysonkvux826547.goabroadblog.com/35613882/فحم-طبيعي-لمحة-عن-خصائصه-و-استخداماته
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