The biologists lowered muck tubes into the marsh to collect sediment samples.

The biologists carefully examined the banded tubes under the microscope to identify any developmental abnormalities.

I spent hours troubleshooting my connection, only to realize the series of tubes was having a bad day.

The technician replaced the worn image tubes to restore the monitor's brightness.

The shipyard workers inspected the Galloway tubes before installing them in the boiler.

The technician collected soil samples using sterile field tubes to avoid contamination.

The salvage team carefully retrieved the drowned tubes from the riverbed to analyze the cause of failure.

The lab upgraded its photomultiplier tubes to improve the sensitivity of the detector array.

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.