3-2-1 Contact
Structures: Pipes and Reeds (7x17)
Ημερομηνία προβολής: Νοέ 01, 1988
There is surprising strength in a tube because it is hollow. We see how tubes are used in bicycles, organs, and roofs.
- Πρώτη προβολή: Ιαν 1980
- Επεισόδια: 225
- Ακόλουθοι: 0