分析了LGK系列空气等离子弧切割机的使用方法，例举了其引弧故障、主电路故障、气路故障、割枪故障产生的原因和解决方法。

This paper analyses the usage of LGK series of air plasma arc cutting machine, and enumerates the causes and solutions of striking arc, main circuit, gas path and cutting torch breakdown.

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本文对XEA电子枪电子束形成区、主透镜等进行了计算机模拟，对该枪优异性能的内在原因进行了分析和研究。

We have carried out full computer simulation on XEA gun for the beam forming region, main lens, and etc. The reasons for its excellent performance is analyzed and investigated in this paper.

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