并存边带传输

[计] compatible-sideband transmission

bìng cún biān dài chuán shū ㄅㄧㄥˋ ㄘㄨㄣˊ ㄅㄧㄢ ㄉㄞˋ ㄔㄨㄢˊ ㄕㄨ