[电学] 多重频率转换; 多重频率变换基安装 frequency changing circuit: 变频电路frequency changing repeater: 变频中继器multiple frequency: 多重频率; 信频,谐波频率,多multiple-frequency: 多频,倍频access frequency-division multiple: 频分多工存取下载手机词典可随时随地查词查翻译