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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.
Industry: Energy
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Coal
本地分銷公司 （土發公司）
Energy; Coal
一個法律實體主要從事零售銷售和/或交付的天然氣通過一個包括主要行 （就是為了攜帶大量的氣體，通常位於下道路或其他主要航道的管道） 和排水溝 （即，管道直徑小的連接到主線的最終使用者） 的配電系統。以來有構建天然氣工業、 氣體或交付安排出售可能由其他代理如生產者、 經紀商和市場行銷人員，指為"非-土發公司 ...
