极近距离煤层开采技术探究
Publisher: 国家哲学社会科学学术期刊数据库
E-ISSN: 1008-8881|28|1|33-35
ISSN: 1008-8881
Source: 山西能源学院学报, Vol.28, Iss.1, 2015-01, pp. : 33-35
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Abstract