滕南煤田的煤层挥发份变化在纵向上具有反希尔特定律的规律；
The change of volatile in Tengnan coad field has the phenomenon of anti Hilt law in vertical direction and the trend of increase from the south to the north in horizontal direction.
滕南煤田的煤层挥发份变化在纵向上具有反希尔特定律的规律；
The change of volatile in Tengnan coad field has the phenomenon of anti Hilt law in vertical direction and the trend of increase from the south to the north in horizontal direction.
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