raise boring [矿业] 天井钻进
raise-boring machine 反井钻机
Raise Boring Method 升井工法 ; 天井钻进法
hard rock raise boring machine [矿业] 硬岩天井钻进机
raise boring machine [矿业] 天井钻机
Blind raise boring machine 盲天井钻机
Some Speed lifting Systems of domestic raise-boring machines are described. Based upon an analysis of their functions, some recommendations for their improvement are proposed.
本文介绍了国内天井钻机的几种快速升降系统及其作用并对其进行了分析，提出了改进建议。
The axial flotation of chuck plays an important role in the protection of rod pipe threads and prevention of rod pipe stripping or cutterhead from dropping during the process of raise boring.
在天井钻进过程中，卡盘的轴向浮动对保护钻杆螺纹和防止钻杆脱扣、刀头坠落等方面具有重要作用。
The authors describe design of deep raise boring equipment and the experimental study on boring technology, and make an approach to some problems occurring in the deep raise boring test.
叙述了深天井钻进设备的设计和钻进工艺的试验研究，并对深天井钻进试验中遇到的一些问题进行了探讨。
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