Inspect the steer tube for cracks before reassembling the headset.

The mechanic inspected the steer tubes for cracks before reassembling the vintage frames.

When fitting a new headset, make sure the head tube is clean and free of burrs.

Scientists explored the lava tubes beneath the island to study ancient volcanic activity.

During the airshow, the two aviators relied on a Gosport tube to communicate across the open cockpit.

The old steamship still had several speaking tubes linking the bridge to the engine room.

The anesthetist lined up several Gosport tubes on the tray before the simulation.

The village installed new tube wells to provide clean drinking water during the dry season.

I lost three matches in a row because someone kept using a noob tube.

During early embryonic development, neural tubes begin to close as part of the formation of the central nervous system.