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。

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This paper introduces the functions, features, structural patterns and key techniques of the CAD system for the short hole drill.

介绍了可转位浅孔钻CAD系统的功能、特点、结构图以及关键技术。

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Aimed at the problems of MYT type hydraulic anchor-hole drill in use, the ways to improve the operation reliability of the drill were offered.

针对MY T型液压锚杆钻机在使用中存在的问题，提出了提高液压锚杆钻机工作可靠性的几种途径。

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"Most dentists are busy looking for a hole to drill and fill, " he said.

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Later tests found oxygen levels at about 7 percent -- too little to survive -- but that may be because the drill hole drifted as it was being bored, Stickler said.

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Curiosity won't make its second drill hole until May.

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