坚硬顶板控制放顶方式及其悬顶长度控制
Publisher: 国家哲学社会科学学术期刊数据库
E-ISSN: 1008-8881|29|4|13-15
ISSN: 1008-8881
Source: 山西能源学院学报, Vol.29, Iss.4, 2016-01, pp. : 13-15
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Abstract