1.It is the unsolidified sediment consisting of disordered kaolinite and small amount organic matter and lignite materials.
常含少量有质或与层等伴生。
2.In this study a series of different maturation degree coals are yielded by thermally treating a lowgrade lignite, and are used as the sorbents for sorption equilibrium study of phenanthrene.
;
质或与
层等伴生。
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