caption: The image shows a drawing of a gearwheel with a cylinder in the center, surrounded by a white background. The gearwheel is composed of a series of interlocking gears, each with a different size and shape, and the cylinder is connected to the center of the gearwheel. The gears are arranged in a circular pattern, with the cylinder at the top and the other two at the bottom. The text accompanying the drawing provides further information about the gears, such as their purpose and how they interact with each other.