English to Greek Tech/Engineering Engineering (general)

A steam turbine that is not in operation is at risk of corrosion that can cause corrosion damage in the turbine casings, valve bodies and condensers, but also in the shaft bearings as well as system valves and motors.
This is the condition in which the turbine and auxiliaries must be preserved.
The shaft train can be in turning gear operation with vacuum broken or can be at standstill.