compact device短语¹⁴⁴⁹⁷²⁺² 基本例句 集聚纺 This paper reports an analysis of problem about impedance match of pseudospark e-beam source of free electron laser and the experiment results on compact device without pulse transmission line. 分析了自由电子激光器的小型虚火花电子束源在去掉脉冲传输线的情况下的阻抗匹配问题，并对此进行放电实验。 dictall