Rotary switches are larger than the rest of the switches shown here, due to the requirements to switch greater power that is required to run the full machine, they may also be able to switch not only single phase electricity but also 3 phase.
Operation wise, no circuit flows until the knob on the switch is rotated from the off to the on position, some machines will also employ a 2 stage rotary switch, the first stage only switches power to the control circuits, while the second position switches power through for the machines heating
element.