Based on "The Data Bank of Chinese coal Rank source" coal sources and characteristics of Huabei district were analysed and evaluated.
本文以《中国煤种资源数据库》的数据为主要依据，对华北区煤炭资源及煤质特征进行了分析评定。
Based on "The Data Bank of Chinese coal Rank source" coal sources and characteristics of Huabei district were analysed and evaluated.
本文以《中国煤种资源数据库》的数据为主要依据，对华北区煤炭资源及煤质特征进行了分析评定。
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