The world's longest tunnel will take shape deep beneath the Swiss Alps on Friday when a giant drilling machine clears a path for a key high speed railway through the heart of Europe.

在巨大的钻孔机清理出一条小道后，横贯瑞士阿尔卑斯山下方世界上最长的隧道终于成形。这条隧道将建设成为穿过欧洲心脏地带的高速铁路通道的关键路段。

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Based on the analysis of requests to pulse generator of high speed small hole EDM drilling machine, a new combination pulse generator is developed in this paper with modular design method.

分析了高速电火花小孔加工对脉冲电源的要求，研制出一种新型脉冲电源——组合式高速电火花小孔加工脉冲电源。

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Rigid connection between 6 and CNC high speed drilling center machine spindle system of machine spindle, the rigidity of bearing and gear performance and the spindle and the handle.

cnc高速钻攻中心机器的主轴系统等机器主轴自身的刚性、轴承及齿轮的性能以及主轴和刀柄之间的连接刚性。

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