短語(yǔ)詞組短語(yǔ)telephone conference system tcs 電話會(huì)議系統(tǒng)Telephone conference bridge system 發(fā)明名稱telephone conference tandem system 電話會(huì)議滙接系統(tǒng)conference telephone system 會(huì)議電話系統(tǒng);會(huì)議電話conference telephone switch system 會(huì)議電話滙接機(jī)conference e telephone switch system 會(huì)議telephone conference of semi -distribution system 半分配制會(huì)議電話 返回 telephone conference system