Based on analyzing the demands of small-diameter deep-hole drill for vibration drilling, a new inner-chip removal drill was designed.
分析了小直径深孔振动钻削对钻头的要求；设计了一种新型内排屑深孔钻头；分析了该钻头的结构和刃磨特点，进行了振动钻削试验。
This paper introduces briefly the present internal and external state of drilling machining methods, drill material, new technology for making drills and some new types of deep hole making drills.
介绍了当前国内外钻削加工的方法、钻头材料、制造钻头的新工艺及一些新型的深孔加工钻头。
The application of finite element method in torsion calculating of deep hole drill is introduced.
介绍了有限元法在深孔钻头扭转计算中的应用。
Subgrade excavation of rock using pneumatic drill and DTH drill Hole drilling, loose blasting in small and deep hole blasting, excavators and loaders loading ballast, dump truck, bulldozer tie.
正在翻译，请等待…路基挖石方采用风钻和潜孔钻打眼，小型松动爆破和深孔爆破，挖掘机和装载机装碴，自卸汽车运输，推土机配合。
What we have done in this paper is of great significance in designing the heavy rock drill to drill deep and large diameter hole.
为大孔径深孔凿岩的重型液压凿岩机的研究与研发打下理论和实践基础。
According to experience of stonework excavation, we plan to adopt a in-the-hole drill to have deep hole controlled blasting technology.
根据石方开挖施工经验，计划采用潜孔钻机布孔进行深孔控制爆破技术施工。
The research of the deep hole processing system which used gun-drill and the forced-air cooling technique;
通过对深孔加工常用方法的分析 ，设计了一种集镗削、滚压于一体的组合镗滚刀具。
The research of the deep hole processing system which used gun-drill and the forced-air cooling technique;
通过对深孔加工常用方法的分析 ，设计了一种集镗削、滚压于一体的组合镗滚刀具。
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