传真电报术 [通信] phototelegraphy ; telephotography ; pantelegraphy ; [通信] picture telegraphy

音频载波电报术 voice-frequency carrier telegraphy

带际电报术 interband telegraphy ; telegraphy interband

无线电报术 wireless telegraphy ; radiotelegraphy

移频电报术 frequency shift telegraphy

字母电报术 alphabetic telegraphy ; telegraphy alphabetic

印字电报术 printing telegraphy ; telegraphy printing

带内电报术 interword telegraphy ; Intraband telegraphy

照相电报术 telegraphy photo