The sthone charcoal stratum and permian system which contain coal, is in large area of Jiaozuo coal field, and coal seams comparatively stable and large in reseves.
英
美
释义
焦作煤田有大面积的石炭二叠系含煤地层分布,并且含煤层数多,煤层较为稳定,储量大;
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