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

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

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.

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

The students carefully labeled the boiling tubes before beginning the heating experiment.

The art teacher collected empty toilet tubes for the children's craft project.

I packed several fishing-tubes in my tackle box before heading to the lake.

Before the experiment, she labeled the microfuge tubes and organized them by sample ID.

The museum's display of early radio equipment featured several audion tubes from the 1910s.