Tube
From Wikipedia, the free encyclopedia.

A tube is hollow cylindrical shape.

For related terms see:

• Cathode ray tube / Electron tube
• Inner tube
• Test tube
• The Tube
• Vacuum tube
• London Underground ("The Tube")

In surfing, the inside of a hollow wave is known as a tube.

The original article can be found at: http://en.wikipedia.org/wiki/Tube.
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