This is the type of gearbox that is used for a rotary motion. Having a different set of gearboxes, called rotary gearboxes, it is in the form of a rotary gearbox. These gearboxes are called the rotary gearbox, also called the rotary gearbox.
Hand crank gearboxes are used for a rotary purpose. There are also gearboxes that are used for rotary work, and as the name implies, rotary gearboxes are used for rotary work. Therefore, hand crank gearboxes are used for rotary lifesaving.