During preflight checks, the technicians inspected the pitot tubes for blockages and corrosion.

Under the microscope, students observed pollen tubes growing toward the ovules.

The antique TVs in the shop still used picture tubes, giving each screen a warm, nostalgic glow.

The factory recalled several models after inspectors found cracked safety tubes on the assembly line.

Scientists examined the damaged sap tubes to determine how the beetles disrupted fluid flow in the tree.

The lab stored several thief tubes in a locked cabinet for future analysis.

The botanist carefully measured the growth patterns of the thistle tubes under the microscope.

During the storm-themed concert, the percussionist played a set of thunder tubes to simulate distant rolling thunder.

The curator explained how Lenard tubes revealed the properties of cathode rays to visiting students.

In the laboratory, Hittorf tubes were used to observe the behavior of cathode rays under different gas pressures.