... frequency-shift 移频轨道电路 frequency-shift telegraphy 移频电报 ; 频移电报技术 frequency-shift keyer 移频键控器 ; 频率键控器 ...
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移频电报术 frequency shift telegraphy
移频电报技术 frequency-shift telegraphy
移频音频电报 frequency shift voice frequency telegraph ; shift voice frequency telegraph
频移电报技术 frequency-shift telegraphy
移频键控电报通信 frequency shift keying telegraph
频移键控电报 frequency shift keying telegraph
移频总报警继电器 YBJ
频移电报 frequency shift telegraphy
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