Which one of the following symbols represents a gas charged accumulator?

The symbol that correctly represents a gas charged accumulator is typically characterized by a rectangle with a wavy line. This design symbolizes the chamber of the accumulator and the presence of fluid or gas within it. The wavy line conveys the idea of the gas being compressed or under pressure, which is essential for the function of an accumulator in hydraulic systems. Accumulators serve to store energy in the form of hydraulic pressure, and the visual representation through this symbol effectively communicates that purpose to those familiar with hydraulic schematics. Understanding these symbols is crucial for millwrights and technicians when interpreting fluid power diagrams and systems.