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ON THE COMPOSITION OF A PERMO-CARBONIFEROUS COAL IN NORTH CHINA
被引：0
|作者：
淺田龜吉
机构：
[1] SocietyofMiningEngineersinTsingtao
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关键词：
test;
ON THE COMPOSITION OF A PERMO-CARBONIFEROUS COAL IN NORTH CHINA;
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摘要：
<正> In general, geologically speaking, it has been noted that if the formation of coal took place during the Permo-Carboniferous period, its volatile matter will al ways be less than 30％ when analized, and the contrary is usually the case for coal created during the Tertiary and Jurassic, these having more than 40％.
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页码：194 / 198
页数：5
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