PDF(4211 KB)
PDF(4211 KB)
PDF(4211 KB)
协同理念下岩金矿脉群连续回采顶板安全跨度研究
({{custom_author.role_cn}}), {{javascript:window.custom_author_cn_index++;}}Research on Safety Roof Span in Continuous Mining of Gold Vein Group Under Synergistic Concept
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