7 Season
223 Episode
3-2-1 Contact - Season 7 Episode 17 Structures: Pipes and Reeds
There is surprising strength in a tube because it is hollow. We see how tubes are used in bicycles, organs, and roofs.
- Year : 1988
- Country : United States of America
- Genre :
- Studio : PBS
- Keyword :
- Director :
- Cast :
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