telephone conference system
短語詞組
- telephone conference system tcs 電話會議系統(tǒng)
- Telephone conference bridge system 發(fā)明名稱
- telephone conference tandem system 電話會議匯接系統(tǒng)
- conference telephone system 會議電話系統(tǒng);會議電話
- conference telephone switch system 會議電話匯接機
- conference e telephone switch system 會議
- telephone conference of semi -distribution system 半分配制會議電話 返回 telephone conference system