Venturi tubes are used to measure fluid flow rates.

The venturi tubes are used to measure the flow rate of a fluid.

I bought some toke tubes for the party.

My plans for the weekend went down the tubes when it started raining.

I need to clean the Schlenk tubes before using them.

Electron tubes are used in amplifiers and televisions.

The scientist carefully placed the test tubes in the rack.

I need to replace the inner tubes on my bike.

The down tubes of the bicycle were damaged in the accident.

I bought some photoglow tubes for the party.