多頻電碼傳信方式 mfc multi-frequency code signaling: 多頻碼信令ssmf signaling system multi-frequency: 多頻信令系統(tǒng)mfc multi-frequency code: 多頻碼signaling code: 信令碼signaling frequency: 振鈴信號(hào)頻率下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯
