天井钻进
Development and application of high power raise boring machine
强力反井钻机的研制及应用
Application of Drilling Technology with Raise-boring Machine to Hard Rock Drilling
反井钻井技术在硬岩中的应用
Practice of using raise boring in excavation of guide hole for shaft with large angle of inclination Construction Technology of Long Curved Hoisting Transportation System in Steep Inclined Shafts
反井钻开挖大倾角斜井导孔的工程实践大倾角斜井长曲线提升机运输施工技术
The paper analyzed the cause of the declination in a raise boring.
这文章分析了天井钻进偏斜的原因。
Any of numerous hand tools for boring holes. Practice of using raise boring in excavation of guide hole for shaft with large angle of inclination
钻孔工具,手钻钻孔用的手持工具反井钻开挖大倾角斜井导孔的工程实践
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