?谐波电报
... harmonic synthesizer 调和推算机 harmonic telegraph 谐波电报 harmonic telephone ringer 谐波电话振铃器 ...
谐波电报
At that time he invented what he called his "harmonic telegraph."
VOA : special.2010.05.14
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。