It is pointed out that the wave of plasma channel can be decomposed into transversal and longitudinal wave, and different effects of the wave on the material removal in different pulse width are analyzed.

• 指出放电通道的波动可以分解成纵波和横波2个分量，并分别分析了短、长脉冲加工时横波和纵波对材料蚀除的不同影响。