Category:Speaking tubes

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<nowiki>Tubo acústico; 伝声管; Tube acoustique; talrör; talerør; spreekbuis; tub acústic; tubo acústico; 전성관; speaking tube; tubo acústico; 通話管; Переговорная труба; air pipe through which speech can be transmitted over an extended distance; luftrør hvor tale kan overføres over en lengre avstand; Воздушная труба, через которую речь может передаваться на большое расстояние; разговорная трубка; переговорная трубка; разговорная труба; Tuyau acoustique; voicepipe; Telèfon acústic; Canonada acústica; Tubo acustico</nowiki>
speaking tube 
air pipe through which speech can be transmitted over an extended distance
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Subcategories

This category has the following 2 subcategories, out of 2 total.

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Media in category "Speaking tubes"

The following 50 files are in this category, out of 50 total.