在保证阴极清理作用的前提下，可以最大限度地减少钨极的烧损。
On Limiting Distribution of Partial Sum and Maximum, and Point Process of Dependent Gaussian Process;
介绍了国内外在实现变极性电流波形、电弧稳定性、阴极清理机理、小孔信号检测等方面的研究现状。
The status of realization of variable polarity current waveform, arc stability, cathodic cleaning mechanism and keyhole detection is introduced in this paper.
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