淮北煤田刘店井田含煤岩系沉积特征及主煤层对比研究
회북매전류점정전함매암계침적특정급주매층대비연구
A Comparative Study on Coal-bearing Strata Sedimentary Characteristics and Main Coal Seams in Liudian Minefield, Huaibei Coalfield
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