Based on mechanic equivalent circuit of the longitudinal ultrasonic horn, the resonance frequency and the amplitude magnification coefficient of three kinds of loaded horns are studied.

在纵振型变幅杆等效电路的基础上，研究了三类负载超声变幅杆的共振频率与放大系数。

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The principle of a frequency stabilizing unit and its power circuit for a double longitudinal mode laser are introduced.

介绍一种双纵模激光器的稳频装置原理及其电源电路。

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