断续等幅波电报

[电] interrupted continuous wave telegraph

duàn xù děng fú bō diàn bào ㄉㄨㄢˋ ㄒㄩˋ ㄉㄥˇ ㄈㄨˊ ㄅㄛ ㄉㄧㄢˋ ㄅㄠˋ