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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 석탄
Coal
조임 정유 티비 공장
에너지; 석탄
주로 정유 공장 내에 있는 티비 (methyltertiary 부 틸 에테르) 생산 시설. 이러한 통합된 정제 단위에서에서 생산 된 티비 유체 고양이 크래커 isobutylene 생산 요구 사항 혼합 내부 가솔린 전용 ...