maceral造句

The type of coal - forming is humic coal, vitrinite is a main variations of coal maceral.
煤的成因类型以腐植煤为主, 镜质组为主要的显微煤岩组分.

There are relationships between absorption and proximate analyses, maceral analyses and ultimate analyses.
煤的吸附量与煤层的工业分析、显微煤岩分析、元素分析之间有一定的关系.