Steam generators are designed with extra tubes so bad ones can be plugged.

Rent an extra tube for your cooler and stop at one of the many areas with picnic tables and grills.

If you want to bring a cooler along, you'll need to rent an extra tube.

You are probably going to require an extra two tubes - Aquastars, for example- if light - loving inverts are to be kept.

You are asked to bring food and drink and an extra inner tube and to wear a helmet.

It also would have been easy to draw extra tubes of blood, Sergeant Wilson said.

The innermost tube has one or more extra tubes wrapped around the main tube.

Many cystoscopes have extra tubes to guide other instruments for surgical procedures to treat urinary problems.

These extra tubes allow for more gain, and thus a more distorted sound.