This is the 15974th most frequent Russian word.
прочищают
"Clean out" or "clear out."
Here, 'прочищают' refers to the action of cleaning or clearing the engine to ensure its proper function.
Механики прочищают двигатель автомобиля.
Mechanics are cleaning the car engine.
In this context, 'прочищают' emphasizes that the pipes are being made clear to facilitate study or investigation.
Учёные прочищают старые трубы для исследования.
Scientists are clearing old pipes for research.
Here, 'прочищают' is used to describe the process of clearing or cleaning an ear professionally using medical equipment.