Feasibility Study of Upward Mining of Close Distance and Inclined Coal Seam Group in Daanshan Mining Area
LIANG Bing;SHAN Longhui;LI Gang;JIN Jiaxu
. 2012, (33): 45 -49 .  DOI: 10.3981/j.issn.1000-7857.2012.33.008

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