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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This paper analyses the main factors that influence the speed of drilling hole, puts forward the methods to settle the main working parameters of the rotary drill.

分析了影响牙轮钻机钻孔速度的主要因素，提出了钻机主要工作参数的确定方法。

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There are the bigger differences between slim hole drilling technology and routine borehole drilling technology. Improving of slim hole drilling speed is of an important actual significance.

小井眼与常规井眼的钻井工艺有较大差异，提高小井眼钻井速度有很大的实际意义。

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