铃波号 Suzunami
振铃波 ring-wave interference
铃仁波切 Kyabje Ling Rinpoche
谐波电话铃 harmonic telephone ringer ; ringer harmonic telephone
方波振铃器 square-wave ringer
马铃薯载波系统 spud carrier system
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本文介绍了采用新的脉宽调制原理和微电脑技术，研制出的25赫正弦波铃流源。
In this paper, using a new principle of PWM and the teehnique of storage system in a microcomputer are deseribed, and a 25Hz sinusidal bell current source has been developed.
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