... 电报扩大器 telegraph magnifier 电报调变 telegraph modulation 电报通信网 telegraph network ...
基于8个网页-相关网页
amplitude modulation telegraph 调幅电报
frequency modulation carrier telegraph 调频式载波电报 ; 调频制载波电报
amplitude modulation carrier telegraph 调幅式载波电报
amplitude modulation radio telegraph 调幅无线电报
phase modulation carrier telegraph 调相式载波电报
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