This paper deals with petrographic characteristics and coal qualities of Jiaoping coal by means of coal petrologic, instrumental analytical and organic solution extraction methods, and so on.
基于煤岩分析、仪器分析及有机溶剂抽提等方法，对焦坪煤进行了系统的煤岩、煤质研究。
The procedure should be sequentially followed by extraction and separation, chemical analysis and instrumental analysis.
该程序应遵循顺序萃取和分离，化学分析和仪器。
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