The tube was too narrow for me to fit through.

I enjoy tubing down the river during the summer.

The electron tube is an essential component in old radios.

Cathode ray tubes were commonly used in old television sets.

I carefully placed the solution into the test tube.

The vacuum tube is an electronic device that controls electric current through a vacuum in a sealed container.

I had a delicious tube steak for dinner.

The Eustachian tube connects the middle ear to the throat.

The picture tube in my old TV broke, so I had to buy a new one.

The submarine is equipped with multiple torpedo tubes.