多頻電碼系統(tǒng) mfc multi-frequency code: 多頻碼mfc multi-frequency code signaling: 多頻碼信令multi-frequency exploration system: 多頻率勘探系統(tǒng)ssmf signaling system multi-frequency: 多頻信令系統(tǒng)voice frequency multi-channel system: 音頻多路制下載手機詞典可隨時隨地查詞查翻譯