(historical) A telephonic instrument for office or similar use, having a sound-magnifying device enabling the ordinary mouthpiece to be dispensed with. It was sometimes used for covertly recording conversations..
현재 검증된 한국어 뜻은 준비 중이며 영어 정의는 “(historical) A telephonic instrument for office or similar use, having a sound-magnifying device enabling the ordinary mouthpiece to be dispensed with. It was sometimes used for covertly recording conversations.”입니다.