... 沼煤 土状褐煤 bogcoal 淡水煤，沼煤 limnetic coal 沼煤 叶煤 易碎褐煤沼煤 moorcoal ...
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水平浓淡煤粉燃烧技术 rich-lean coal firing technology
·2,447,543篇论文数据，部分数据来源于NoteExpress
淡水河谷计划对镍，铜，煤和碳酸钾业务进行有机扩张。
Vale has plans for organic expansion in nickel, copper, coal and potash.
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煤是由淡水植物遗骸形成的。
Coal is formed from the remains of fresh-water plants.
Coal is formed from the remains of freshwater plants.
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