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2 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 dictograph
 偵聽器

From: Webster's Revised Unabridged Dictionary (1913)

 Dic·to·graph n.  A telephonic instrument for office or other similar use, having a sound-magnifying device enabling the ordinary mouthpiece to be dispensed with. Much use has been made of it for overhearing, or for recording, conversations for the purpose of obtaining evidence for use in litigation.
 Note: ☞ The makers of this instrument spell it dictograph.
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