PDF(1853 KB)
PDF(1853 KB)
PDF(1853 KB)
急倾斜破碎矿体采矿方法改进与顶板再造设计
({{custom_author.role_cn}}), {{javascript:window.custom_author_cn_index++;}}Improvement of Steep and Fractured Ore-body Mining Method and Design of Re-Construction of Sub-top
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