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本书就各种类型系列钻具的合理利用和钻进爆破井的技术参数选择提出看法。为在脆性和裂隙岩石中钻进,作者建议采用镶嵌
This book puts forward the view on the rational utilization of various types of series of drilling tools and the technical parameters of drilling blasting wells. To drill in brittle and fissured rocks, the authors suggest inlay