HyperDic: speaking_tube

English > 1 sense of the expression speaking tube:
NOUNartifactspeaking tubea tube for conveying the sound of a voice from one room to another
English > speaking tube: 1 sense > noun 1, artifact
MeaningA tube for conveying the sound of a voice from one room to another.
Broadertube, tubingconduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids / liquids or gases
Spanishtubo acústico
Catalantub acústic

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