Mechanics inspected the steerer tubes for cracks before approving the frames for the race.

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

The factory inspected dozens of head tubes to ensure each one met the new durability standards.

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

The lab technician carefully filled the U-tubes with different colored solutions to demonstrate siphoning.

The university museum displayed several antique Crookes tubes used in early physics demonstrations.

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

During the simulation, the software highlighted the intersections of the Ewald tubes with the reciprocal lattice, revealing possible diffraction conditions.

The submarine's torpedo tubes were loaded and ready before dawn.

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