main coal district 主要煤产地
Zhadu coal district 渣渡矿区
Suxian coal district 朔县矿区
Daxinanling gathers the coal district is the early chalk world gathers the coal deposition.
大兴安岭聚煤区是早白垩世聚煤沉积。
Wumuchang Area is a local bituminous coal district metamorphized by sub-volcanics in Yiming Coal Field which is located in northeast China.
五牧场区是内蒙东部伊敏褐煤盆地中一个因次火山侵入作用形成的局部的烟煤区。
This paper, on the basis of petrofabric analysis, analyzed and studies Wenwangshan faults and Wangjiagou thrust faults in Lu-an coal district.
本文从岩组分析的角度出发;对潞安矿区的文王山断层和王家沟道冲断层进行了分析研究。
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