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Coal
Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. Coal is composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.
Contributors in 石炭
Coal
パイプライン(石油)
エネルギー; 石炭
原油・製品パイプラインの原油及び石油製品、それぞれ (を含む州連帯、州内、および社内パイプライン)、50 の州とコロンビア特別区内を輸送するために使用します。 ...