books humic coal
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# humic acid
# What is coal?
# What do you mean by liquefying coal?
# bituminous coal
# Oh coal, my lord!
# coal towns
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# European Coal and Steel Community
# coal age events
# coal infrastructure
# Coal Technologies
# coal companies
# coal companies in australia
# coal mining in india
# coal mining in the netherlands
# coal europe
# Coal companies in Asia
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# hard coal
# coal mining
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Source: wikipedia.org
فحم دبالي (Info)
الفحم الدُبالي (بالإنجليزية: Humite) هو معدن يوجد في الكتل البركانية المنبثقة من جبل فيزوف في إيطاليا. اكتُشِف عام 1813 م.
