electric pulse短语¹⁴⁴⁹⁷²⁺² 基本例句 电脉冲 It is shown that bidirectional electric pulses may be used as an ideal electric pulse excitation for the generation of high- amplitude, short- duration pulse ultrasonic waves. 结果证明，双向电脉冲是激励压电超声换能器比较理想的电脉冲波形，可以得到幅值大、脉冲持续时间短的超声波，有广泛的应用前景。 cnki