7 Asonતુ
223 એપિસોડ
3-2-1 Contact - Season 7 Episode 17
There is surprising strength in a tube because it is hollow. We see how tubes are used in bicycles, organs, and roofs.
- વર્ષ: 1988
- દેશ: United States of America
- શૈલી:
- સ્ટુડિયો: PBS
- કીવર્ડ:
- ડાયરેક્ટર:
- કાસ્ટ: