Through analyses of relativity on coal quality and mineralogy and elements, summarized geological reasons caused differences between norm al and trace elements in the two types of coal.
通过煤质特征、矿物学和元素的组相关性分析，概括了引起这两种类型煤常量和微量元素之间差弄的地质原因。
Through analyses of relativity on coal quality and mineralogy and elements, summarized geological reasons caused differences between norm al and trace elements in the two types of coal.
通过煤质特征、矿物学和元素的组相关性分析，概括了引起这两种类型煤常量和微量元素之间差弄的地质原因。
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