PDF(113 KB)
PDF(113 KB)
PDF(113 KB)
提高炮采面块煤率的松动预裂微差爆破新技术
({{custom_author.role_cn}}), {{javascript:window.custom_author_cn_index++;}}New Technique for Increasing Production Rate of Lump Coal in Stopes by Loose Pre-shearing Millisecond Blasting
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